Dana 60 under 73 swinger..need id

Why would you use this axle? Was it really cheap?
IF you plan to drag race it with the hopes of getting into the 10s, I could see the appeal. The Dana 60 is nearly indestructible in a light car BUT it is heavy and takes HP to spin. Same with a 727 VS a 904. I had a buddy with a 340/416 Challenger that chose a Dana 60 before stepping down to an 8 3/4" axle.
Yeah, you can change the axles, brakes, fit a drive shaft and make it work but you are getting away from a CHEAP build. The axles alone could run you $400 or more. You could get an Explorer 8.8 from a self serve yard on a half price special for well under $200. That gets you disc brakes and the right lug pattern.
Good luck.

Agree with your comparison of a 904 to a 727 and the parasitic loss. However you have it backward between the Dana 60 and the eight and three-quarter and other rear ends. The Dana 60 is more efficient and Weight Wise within 40 pounds or so of a fully loaded 8 and 3/4.
I've hauled women around that weigh more than the difference between a Dana 60 and and 8 and 3/4.