12 Bolt Fitment
 

I have a 67 Nova 12 bolt that measures 57.75”, will this fit in a 69 Camaro that measures 60.0” without any rubbing?

Probably? well you would need to see what clearance the tires/wheels have now being they would move in about 1 1/8+" per side next issue is the perch width
Center to center of the perches should be about 42 1/2" on 67-69's and early Nova's Looks like 43.5" so without moving the perch's its not going to "Fit" without some modification and also wheel offset can help
Note: if its an original Chevy II 12 bolt its worth more than a correct 67-69 12 bolt would be unless its the elusive BE coded Copo rear

I think I’ll just sell that Nova rear end as it really should go on the correct car.