Originally Posted by AL-David

LOCO, i did some research on the rear ends when i was looking into puttin the vg in my miata, the rx7 rears can be done but take a little work and are pricey, a stronger, lighter, cheaper alternative is a lincoln ls rear diff & modified thunderbird / cougar axles and hub assemblies. itl take the power of a heavily modified V8. you oughtta ask kevin whats done for the rear end in that sb ford powered miata they have at PAS.

Good luck with the swap!