Hamon-
Is it pronounced "Hey-mon" like a greeting from the Carribean?
Seriously, check out this
ChevyTrucks.org page for a handy rear-end table or two.
Looks like your pick-up would be 62" flange to flange and a '71 Camaro comes in at either 60" or 61-1/2". Pretty close, but getting out the tape measure on both donor and recipient will be the test.