Casting numbers/date for the block, heads, trans. Difficult to look for things like crank flange (unique 302 flywheel flange), distributor number and date, exhaust manifolds, single 3/8" fuel line, 4 leaf rear springs, 12 bolt rear code and build date prior to car assembly, driver's side rear bracket for dual exhaust in the wheelhouse frame rail, 2418 non-dripper valve covers, and on and on. Documentation/paperwork would be a plus. Carb is a little early, BTW - could be closer to the engine by a few months in my opinion. Get the seller to give you more details if you have the time -
Regards,
Steve