Conserv,
thanks! great advice. First, i've updated my profile to say i live in NorCal, San Francisco Bay Area.
secondly, i took a bunch of photos... i didn't see an engine number where you said to look, i saw the flat, and saw two X's (see photo). i did see a "21 US" on the block right next to what looks like the transmission number. i also took pics of the carb, the distributor and the VIN.
Tomorrow i'll dig around the forums to see if i can decode these things.
again, thanks for the advice, this is a great way to determine what i actually have!
Kyle