Originally Posted by
Caddyshack
With the diff fitting kit plus a billet rear cover there has never been a failure even with 1000bhp drag cars.
I have one of Marks 6 degree beams modded to take the diff with no kit but I previously ran the diff kit with 469 bhp and 500ftlb no probs at all.
But yours is a 4x4 with 66% of the power going to the rear. So that's comparable with a 310 bhp rwd, which is normally not a problem for the standard 7.5" diff either.