68 dart SL6.

Hey out there. I have a 68 dodge dart slant six, "love this thing" mild build on it. not long after i rebuilt the motor the 40 some year old 7.1/4 rear is ready to become scap metal. I have looked into the 8.1/4 and the 8.3/4 rears, they are hard to find and i have lots of time not lots of money. So there are things to think about, I have a 8.8 out of a 97 ford exploder. Nice disc brakes 3.72 gears and traction loc. for 150.00 in my garage. It looks like the small bolt pattern the same as my hubs. could be wrong? Any way i here it is not that hard to fab this unit to fit my a body car and i have looked into this a little. I would love some feed back from the pros out there and some helpful info. Thanks patrick the dodge lover.