There should be a letter/number sequence stamped (not cast) on a machined pad on the front of the engine block just ahead of the passenger's side cylinder head. The last few digits in the sequence which are usually letters, will identify the engine size and possibly the year it was manufactured. There are several engine number conversion websites on the internet.
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!