Looking at a pumpkin

Won,t fit 7 1/4.You could look for a complete 8 1/4 or 8 3/4 that will bolt into your 72 Dart.The 8 1/4 has large bolt patten(LBP)and the 8 3/4 will have small bolt pattern(SBP)unless the axels have been changed to LBP.You,ll also have to do some measureing with your driveshaft for fitting.Hope this helps?:read2: