if those long bolts are actually in the front crossmember they'd be for the 235 - if in brackets riveted to the back of that crossmember they're the V8 mounts ...
here's a 57 235 -
other side .... sounds like the engine is from a different [later] application with that front mount, but you might be able to adapt that, otherwise you'd need an added on crossmember [like for a late model V8] to use the further back mount points
Bill
