I have a 8 3/4 with a 657 pig in it. it is a posi unit with 3.91's tiny little u joint.

I have a stripped d60 with 4.10s and its open, big u joint (1350?)

Plan A: have driveshaft made for 8 3/4 run it till it breaks.

Plan B: buy posi for dana 60 at 30 spline, swap over 8 3/4" axles and cut d60 to fit current axles have driveshaft made for this

Plan C: Buy axles, posi and new gear set for dana along with new driveshaft. ( not in budget for car right now)

Any chance the 8 3/4" will live on the street with sticky tires a manual trans and a 540? at lease for a little while?


I need a driveshaft for any combination rear end I do. if I have one made for the 8 3/4" will I be able to reuse for the d60? if i have to swap ujoint sizes from the small 8 3/4 to the big d60 one?