Originally Posted by duspan
what are the best spark plugs to use with these heads?

It depends on which fuel your using, the compression ratio, type of use, race or street or and so on shruggy
E85 fuel doesn't like hot plugs and a lean mix on pump gas or race gas like them colder shruggy

Last edited by Cab_Burge; 09/30/20 06:06 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)