Yea the engine is not the original 350, it was out of a Bonneville I think I found out
The guy at RARE (Paul I think) told me that they were probably out of a '72 since the heads were missing 1 of the bolt holes, he said that 72' was a GM strike year or something, and they cut corners?
Anyway my mechanic did not replace the existing heads, he sent them to someone else local that did something to them the change the compression I guess, he also drilled a hole in each of the heads for the new LB manifolds will have all 6 bolts holding them on

Thanks for thinking of that anyway Vikki hope you doing well.