What plugs does everyone run in Edelbrock Performer RPM heads? The kid I got the heads from had some Bosch Platinum 2 prong plugs in there and my machine shop they were too short reach and it started pitting around the plug area. Prob got the plugs for stock heads so which correct ones should I run?....Summit has these listed for the heads.....
Autolite Copper core FRM-3926
Champion ERC12YC
NGK V-power 7938
Autolite Copper core FRM-3926
Champion ERC12YC
NGK V-power 7938
