i am looking at replacing my driveshaft and associated parts. these are the part numbers i have found for 1972 with 351c with FMX; drive shaft D1ZZ-4602-C (2 3/4 x 51 3/32)...yoke C3AZ-4841-A 31 spline...Front U-joint C3AZ-4635-E....Rear U-joint C3AZ-4635-F. i dont see a different number for different body type. I am considering going with an aluminum driveshaft since the prices arent much different and i dont have more than 500HP. Any comments by anyone who has had experience with driveshaft replacement is welcome. Suppliers, alum vs steel, u-joint sizes, and yoke manufacturers/materials are of interest. looking at the bigger suppliers like Inland and Denny's. And how in the world can a driveshaft be installed off center in the yoke?