8.5

[Anonymous]

WILL HA 8.5 HOLD UP TO ABOUT 600 HP AT THE REAR WHEELS OR SHOULD I GO TO A 9 INCH

 

[Malibu355]

IMO you could invest about $1000 and it will hold up.

Spool
Axles
C-clip eliminators
Good quality ring and pinion gear set
Rear end girdle cover

 

[Bar50]

I would go with the 8.5 before the 9 inch. You start putting lots of power to the ground with slicks and suspension tuning, the 9 inch will require a stronger front pinion bearing support, nodular case....

I have seen GN's go into the 9's with less added to the rear end.