MonsterBilly

I have a 331 stroker with trick flow aluminum heads and a stealth intake with an MSD ignition and distributor.
I run pump gas and it's about 10 to 1 compression and a live in the desert so my car runs pretty hot Already

barnett468

the last numbe on the plug is the heat range you should have a 4 for stock you can try a 3 do not use champions. . plugs wont help a ton you need cooling improvements.

Starfury

Trick Flow recommends Autolite 3924's, which is what I run in my 331. No problems so far. Are you having problems with your existing plugs?

67mustang302

Autolite 3924 is about right. A 3 might be too cool, you'll know if you get deposits on the plug that don't burn off.

And yeah, plugs aren't the solution to a hot environment, cooling system is. Plugs deal with the engine build itself, hot enough to burn deposits off, without being so hot you get pre-ignition.

MonsterBilly

thank you, Im not changing plugs for temperature. I just wanted to include as much info as possible.

just doing a little work to the car and wanted to be sure to get the correct plugs.