BlueDream
Aspiring Mopar enthusiast
IF it's a 73 and IF it had disk brakes, then it will be large bolt pattern (grab the front brakes too if you can). Unless it was 318 manual transmission or 340 car it will most likely still be a 7 1/4. No gain there other than the LBP. The gear ratio might be worth considering. It would be a step backward to replace 3.23's with 2.76's.
It could still be an 8 1/4 if it had a slant.