I have Jays timing cover, and I plan on using a 351c seal.
I bought a brand new steal balancer spacer, and reading the instructions for the cover it says to machine the sealing surface out towards the balancer, by ~ .625 (? IIRC ) .
I gave the spacer to a co worker who has a lathe, but I wanted to double check before he started cutting on it. There is a short step from the large diameter ( balancer end ) to the back, and he wants to make sure he doesn’t cut to the wrong dimension.
I figured one of the experts here would know off the top of their heads what diameter to cut it to.
Thanks!