I assume you're aware that more is involved than just an engine swap. You'll basically be transplanting an entire drivetrain- - - -engine, transmission, and rear axle, plus different clutch and brake pedals and all the associated linkage. That's why most "upgrades" involve swapping to a 54-62 235 or 261 engine. Those are close to a bolt-in swap, and will be able to mate up to the existing drivetrain a lot more easily.
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!