Can I replace a 5.0L (307CID) Oldsmobile engine (if that is what it is) with a Chevy 350, Main Cap Bolt 2 or 4 (car, truck, Vette') with compatibility to the TRANSMISSION that is on my car? Also, will the exhaust system have to be re-specified as well as the carburetor? And last but not least, will my Air Conditioning unit fit without to great of a degree of modification?