The Ford Barn - View Single Post - Question for the guys running aluminum heads

jeepguy1948 · 07-08-2023, 10:52 PM

Champion RC12YC is the plug that comes up as being what Edelbrock recommended. This is the plug that went too far in. It is absolutely correct that I do not know for certain what may have been or not been done to these heads prior to me acquiring them in 1976. They do not look like the exterior surface where the plug seats has been altered but who knows? The plugs that we had previously were NGK B-4L and those were too short. Before that it had Bosch WR8EC and they were even shorter. Interestingly the Champions have a 5/8” hex on them which seems very strange for a plug used in the 1950’s? These champions are .75” BTW.

07-08-2023, 10:52 PM	#12
jeepguy1948 Senior Member Join Date: Jan 2022 Posts: 723	Re: Question for the guys running aluminum heads Champion RC12YC is the plug that comes up as being what Edelbrock recommended. This is the plug that went too far in. It is absolutely correct that I do not know for certain what may have been or not been done to these heads prior to me acquiring them in 1976. They do not look like the exterior surface where the plug seats has been altered but who knows? The plugs that we had previously were NGK B-4L and those were too short. Before that it had Bosch WR8EC and they were even shorter. Interestingly the Champions have a 5/8” hex on them which seems very strange for a plug used in the 1950’s? These champions are .75” BTW.