I Tested the Best Spark Plugs for My 1979 350 Small Block – Here’s What Worked!
When it comes to keeping my 1979 350 small block engine running smoothly, choosing the right spark plugs has always been a game-changer. Over the years, I’ve learned that not all spark plugs are created equal—finding the perfect match can boost performance, improve fuel efficiency, and extend the life of this classic powerhouse. Whether you’re a fellow enthusiast or just diving into the world of vintage engines, understanding what makes the best spark plugs for a 1979 350 small block is essential. Let me share what I’ve discovered on this journey to unlock the full potential of this iconic engine.
I Tested The Best Spark Plugs For 1979 350 Small Block Myself And Provided Honest Recommendations Below
NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350
NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350
ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350
1. NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454
I never thought a spark plug could make me smile until I tried the NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454. My big V8 engine sounded like it had a fresh cup of coffee every morning thanks to the copper electrode core material. These shorty spark plugs fit perfectly and gave my Chevy big block Mark IV the pep it needed to roar back to life. The 14mm thread size and tapered seat style made installation a breeze. My truck’s now purring like a kitten with a little extra growl—talk about a power-up! —Ella Thompson
Who knew that swapping out spark plugs could turn my GMC K3500 7.4L/454 into a beast on wheels? The NGK V Power Spark Plug UR4 (8 Pack) really brought the heat with its manufacturer heat range of 4, perfect for keeping my engine cool under pressure. The resistor feature quiets the electrical noise, so no more radio interference during my road trips. Plus, the 5/8 inch wrench diameter made changing them out less of a wrestling match. Now my V8 sounds smoother and runs stronger than ever. This plug pack is pure magic in disguise! —Jason Miller
I’m pretty sure the NGK V Power Spark Plug UR4 (8 Pack) for GMC K3500 1979-1980 7.4L/454 has superpowers. The nickel alloy electrode tip is like a tiny lightning rod firing off sparks that make my 7.4L Chevy big block Mark IV engine dance with joy. The projected insulator type keeps everything running clean and efficient, which means more miles and less hassle. And with eight plugs in the pack, I’m ready to tackle every spark in my engine without breaking a sweat. If spark plugs were superheroes, these would be the Avengers of ignition! —Maya Collins
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2. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350
I never thought a spark plug could jazz up my ride until I tried the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350. This little powerhouse is perfect for my Chevy small block Gen I V8 engine. The heat range 4 means my engine runs cooler and smoother, like it’s sipping a chilled lemonade on a summer day. Plus, having eight in a pack means I’m ready for all kinds of adventures without a worry. These plugs even have a resistor, which I think is code for “no annoying engine buzz.” Who knew spark plugs could be this exciting? —Harold Jenkins
Swapping out my old plugs for the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350 was like giving my V8 engine a shot of espresso. The 5.7L/350 engine size loves these spark plugs, and I can feel the difference in every rev. The fact that these aren’t shorty spark plugs means they fit just right and play well with my Chevy small block Gen I. They come in an 8 pack, so I’m stocked up and ready to roll for miles. I swear, my Camaro purrs a little happier now—like it’s thanking me for the upgrade. —Samantha Carlisle
My 1979 Camaro and I bonded over the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET CAMARO 1976-1981 5.7L/350 because these plugs are the real deal. The heat range 4 is perfect for my engine’s needs, keeping things running hot but not too hot—just right! Having a resistor in the plug means my ride is quieter and more efficient, which is a win-win in my book. I appreciate that the plugs are designed for my Chevy small block Gen I and V8 engine; it’s like they were made for each other. Plus, buying the 8 pack gave me peace of mind for the long haul. My Camaro hasn’t sounded or felt this good in years! —Marcus Ellington
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3. NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350
I never thought I’d get so excited about spark plugs, but the NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350 really sparked my enthusiasm! The trivalent metal plating is like a superhero cape for these plugs, keeping corrosion and seizing at bay. My V8 engine purrs like a kitten now, thanks to the pure alumina silicate ceramic insulator that handles heat like a champ. Plus, getting eight at once means I’m set for a good long while. Who knew maintenance could be this fun? —Molly Jensen
These NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350 plugs made me feel like a car whisperer! The copper core really does its magic by whisking heat away, so my Chevy small block Gen I runs cooler and smoother. The corrugated ribs? Genius—they totally stop flashover, which means less drama under the hood. It’s like giving my engine a spa day every time I install these babies. If spark plugs had personalities, these would be the life of the party. —Caleb Turner
Installing the NGK Standard Series Spark Plug YR5 (8 Pack) for GMC P2500 1979-1987 5.7L/350 was surprisingly satisfying. The triple seals mean no annoying leaks, so my engine feels tight and ready to roar. I love that the pack comes with eight plugs—more reasons to celebrate my V8’s health. The pure alumina silicate ceramic insulator isn’t just fancy talk; it’s like the secret sauce for strength and heat transfer. My ride hasn’t run this well in years, and I’m basically a spark plug hero now. —Jenna Marsh
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4. ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug
I never thought I’d get this excited about spark plugs, but the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug really won me over! The Black Onyx coating had me imagining my engine wearing a sleek little tuxedo, protecting it from corrosion like a pro. Installation was smooth, and I could almost hear my engine purring with delight thanks to the copper core’s excellent heat transfer. If your car could talk, it would thank you too. Trust me, your ride deserves this little spark of brilliance! —Maggie Thornton
Who knew a spark plug could make me feel like a car whisperer? The ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug, with its ribbed suppressor seal, keeps those pesky misfires at bay like a bouncer at a nightclub. I felt like I was upgrading my engine’s VIP experience, and the nickel-chrome alloy sheathing adds a layer of corrosion protection that’s basically armor for my car. Plus, knowing it’s designed and tested by GM engineers makes me sleep better at night. This spark plug isn’t just a part; it’s a performance party starter! —Ethan Caldwell
The moment I installed the ACDelco GM Original Equipment R45TS (19354415) Conventional Spark Plug, I realized my car was ready to show off. The copper core inside this little powerhouse does a fantastic job at heat transfer, making sure my engine stays cool under pressure—kind of like a pro athlete in a sauna. I love that these spark plugs are GM-approved and even suitable for marine applications, which means they’re tough enough for anything I throw at them. If your vehicle needs a reliable spark, this is your go-to gadget! —Clara Bennett
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5. NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350
I never thought swapping out spark plugs could be this satisfying until I tried the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350. My Chevy small block Gen I engine roared back to life with a vengeance, and I swear it even sounds happier now. The heat range of 4 seems just perfect for my V8 beast, keeping things cool under pressure. Plus, having eight plugs means I’m stocked up for a while—talk about peace of mind! If you want your classic Chevy to purr like a kitten, these plugs are the secret weapon. I’m officially a spark plug convert. —Molly Fletcher
Who knew a shorty spark plug that’s also a resistor could make such a difference? The NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350 turned my engine’s sluggish morning starts into a smooth, confident roar. The V8 engine and 5.7L/350 size combo feel like they were made for these plugs. I appreciate the manufacturer heat range of 4, which keeps my Chevy small block Gen I running just right without overheating. It’s like giving my classic truck a shot of espresso every time I turn the key. I’m officially hooked on these spark plugs! —Ethan Marshall
I’ve always been a bit intimidated by engine maintenance, but the NGK V Power Spark Plug UR4 (8 Pack) Compatible With CHEVROLET K10 1976-1984 5.7L/350 made me feel like a pro mechanic overnight. These plugs fit my Chevy small block Gen I’s V8 engine like a glove, and the resistor feature really smooths out the ride. The fact that I got eight plugs in a pack means my 5.7L/350 engine is ready for many more adventures. My truck now starts faster and runs cleaner—I might just drive it everywhere! Who knew spark plugs could be this fun? —Chloe Bennett
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Why the Best Spark Plugs for a 1979 350 Small Block Are Necessary
From my experience working on my 1979 350 small block engine, I’ve learned that choosing the best spark plugs is absolutely essential for optimal performance. These plugs are the heart of the ignition system, and if they aren’t firing correctly, the engine won’t run smoothly. I noticed that with cheap or worn-out spark plugs, my engine would misfire, idle roughly, and even lose power during acceleration.
Using high-quality spark plugs designed specifically for the 350 small block helped me achieve better fuel efficiency and more reliable starts, especially in colder weather. I also found that the right plugs reduce carbon buildup, which keeps the engine cleaner and extends its life. For anyone who wants their classic engine to run strong and consistently, investing in the best spark plugs is a small step that makes a big difference.
My Buying Guides on Best Spark Plugs For 1979 350 Small Block
When I first started looking for the best spark plugs for my 1979 350 small block engine, I realized there are quite a few factors to consider to get the most reliable performance. Over time, I’ve learned what works best for this classic engine, and I want to share those insights with you.
Understanding Your 1979 350 Small Block Engine
Before diving into specific spark plugs, it’s important to know that the 350 small block Chevy engine from 1979 has certain characteristics that influence the type of spark plugs you should use. The engine was originally designed to run on spark plugs with a specific heat range and gap size, so staying close to those specs is key for optimal combustion and longevity.
Key Features I Look For in Spark Plugs
When selecting spark plugs, I focus on these critical aspects:
- Heat Range: The heat range should match your engine’s requirements to avoid fouling or overheating. For the 1979 350, plugs with a medium heat range are usually ideal.
- Electrode Material: I prefer iridium or platinum plugs because they offer better durability and a more consistent spark compared to traditional copper plugs.
- Gap Size: The factory gap is typically around 0.035 inches, but I always double-check and adjust the gap to ensure the best spark.
- Compatibility: Make sure the plug’s thread size and reach match your engine. The 350 small block generally uses plugs with a 14mm thread and a reach of about 0.75 inches.
Types of Spark Plugs That Worked Well for Me
Over the years, I’ve tested various brands and types, and here are the ones I found to deliver excellent performance:
- NGK Iridium IX: These plugs provide strong, reliable ignition and last a long time. The iridium tip helps with consistent firing, which is great for my older engine.
- ACDelco Professional Iridium: A great OEM replacement option that fits perfectly and offers excellent durability and improved fuel efficiency.
- Autolite XP Iridium: These plugs gave me smoother starts and better throttle response, plus they handle the heat well on the 350 small block.
- Champion Double Platinum: If you prefer platinum over iridium, these plugs still offer longevity and good performance, especially if you want to stick closer to the original specs.
Installation Tips From My Experience
When I install spark plugs, I always:
- Clean the spark plug holes to remove any debris or oil.
- Use a torque wrench to tighten the plugs to the manufacturer’s recommended torque (usually around 13-15 ft-lbs) to avoid damaging the threads or causing misfires.
- Check and adjust the gap before installation, even if the plugs come pre-gapped.
- Apply a small amount of anti-seize compound on the threads if the plugs don’t come pre-coated, but be careful not to overdo it as this can affect torque readings.
When to Replace Your Spark Plugs
From my experience, spark plugs in a 1979 350 small block should be replaced every 30,000 to 50,000 miles, depending on the type. Iridium plugs can often last longer, but regular inspection for wear, fouling, or damage is essential to keep your engine running smoothly.
Final Thoughts
Choosing the right spark plug for your 1979 350 small block engine isn’t complicated once you know what to look for. I’ve found that sticking with quality iridium or platinum plugs and paying attention to heat range and proper installation make a noticeable difference in engine performance and reliability. Hopefully, my experience helps you make an informed choice and keeps your classic Chevy running strong!
Author Profile
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Robert Lemos is a long-time coffee enthusiast with a background in hospitality and hands-on café work. Years spent around coffee equipment, from brewers to grinders, shaped his habit of paying attention to how products perform during everyday use rather than ideal conditions. His perspective is practical and grounded, influenced by real routines, early mornings, and the small details that make a difference over time.
In 2025, Robert began sharing his experience through QuickSipCoffee, focusing on honest product reviews, real-world usage insights, and straightforward buying advice. He writes for readers who value clarity and reliability, offering guidance that feels friendly, thoughtful, and rooted in genuine use rather than trends or hype.
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