those are hub caps, its a 5 lug pattern.
nice solid looking car, all i see are a few dents in that 12 foot long quarter panel. id find a appraiser like said before, best way to figure it out. or see what other cars are selling for in the same original condition.
as far as the engine size, 65 seems to not be marked on the block. but id look for it anyways. if you find a casting of 400 455 ect you know its been changed.
silly thing is the Pontiac big block is really the same size as a small block, unlike a bb chevy where you can tell its a bb or a sb. so it could be a 350 or other engine. makes building a stroker pretty damn easy.
to bad the window sticker is not there, it would tell you everything the car came with, back then you ordered your car from a long list of options.
