The only absolutely sure way to tell what you've got is to pull a cylinder head and measure the bore and stroke.

283: 3 7/8" bore, 3" stroke.

327: 4" bore 3 1/4" stroke
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!