The stamped ID number on the front of the block ahead of the passenger's side head will have a "T" in the suffix following the numbers on 4-bolt engines. I used to identify them that way when we were searching salvage yards for engines to build for the round track.
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!