New owner of a 1976 Plymouth Duster

looks like an 8 3/4 rear, and a single barrel 318. dunno bout a tranny. depending on how much you plan to race will depend on the tranny. I'd use a 904 just because of the weight difference between a 727 and 904. but it also depends on what kind of horsepower you're planning on running. if you're looking at a higher horsepower motor i don't think that the extra weight of a 727 would be a big deal, plus it will be a fair bit stronger then a 904. just my 2 cents, hope it helps. good luck with the resto!!