cost was a factor for me. i just bought a strange driveshaft, trans and pinion yoke to replace in my '74 challenger. when i got my clutch issues straightened out, first pass, this happened. i didn't even have the driveshaft and yokes in the car yet either. the car hooked like it never hooked before. i couldn't just toss the stuff i just bought and switch to a dana so i went with the MW caps, crush sleeve eliminator, and all new parts and case. it wasn't hard to machine the caps to fit the housing.