Is this something that can be done in the truck? I made this mistake rebuilding the heads and was wondering if it’s easier than pulling the heads off again.
@@THORRACING1I drilled the holes in a lathe so they would be perfectly centered. The 7/16" and "J" hole can be drilled with a normal drill bit. The 9/16" hole MUST be drilled with an end mill to produce a nice flat surface to drive the seal.