6bblgt makes a very good point....but "at a glance" that looks like a neutral balance harmonic balancer = 383 forged crank for 71. Is it symmetrical with no offset weight on it? And yes, your other crank would work just fine too. It would all work as-is, but I'd still balance it...but I balance everything.

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"