360 longblock for a van?

Came across a guy selling a still wrapped 360 longblock that he says is for a 73 2500 van. What differences does something like this have from the stock 73 318 in my Dart now. Would there be any mounting issues? Would I be displeased with compression? Is the cam undesireable? I'm at the point where it looks like my 318 needs a rebuild and searching for options. Any info is appreciated.

~Sae