Small Block Engine EXPERTS

I measured the distance outside of one hole to outside of the other and got 4.137", then I measured the hole .515". So 1.137 minus .515" equals 3.632" (center to center, more or less). The holes are larger than the bolt and they are not perfect so maybe that's why I can't get 3.7. I do know that the other caps I have are 318 and the holes are closer together by about .100". I don't have the rear main cap, only the 4 caps and bolts shown above in post #1.

Treblig