Spark Plug suggestions

[Jeff65]

Originally posted by matt1190
Thanks Jeff, but what do you run in yours or what would you recommend? Currently my plugs are dry and DARK browninsh gray,..I'm happy with the carb settings even if it is a little too rich, so I'm wondering if I need a hotter plug to better burn the fuel. I've heard a lot of people tell me NGK plugs kick ***, and I've heard the same of Autolite. What do you guys think? I'm running a Fireball ignition box by comp cams with 8mm wires off of a motorsport vac advance distributor, if that helps any. THanks!

You have a very hot ignition system and it will surely fire colder plugs. I would back off one heat range at a time until you get a lighter looking insulator after 10K miles use. Fact is your ignition system will kick *** with almost any plug that bolts in. You can use whatever you want to try, just look at the length of the center insulator. It should be shorter from base to electrode tip than the ones you're using now. Each shorter center insulator will be a step cooler. Hot plugs=long center insulator Cold plugs=short center insulator. Since you have hot ignition box you need cold plugs.