1965 Barracuda 273 rebuild...intake code?

I dont know how they got that manifold to fit on a 64-65 head (blocks were the same) as the intake bolts are a different size (5/16) and angle! Did the bolts look like they lined up flush to the holes? It can be done but you need to lean a drill over in the manifold holes to make them at least line up (more vertical) then use hardened washers under the bolts and youll still probably have oil seepage there. Interesting......never seen a cast iron intake adapted like that.