[b454rat]

I wouldn't say worthless just not great. I had a truck with a stock TBI 454, auto, 373s and 40" boggers and even with the not so great lowrange of the 205, still wasn't terrible offroad. On road at highway speeds will be a little doggy, I'd say 4.56s be a good compromise....

Also the Detroit pic above replaces the side gears inside the carrier, so doesn't matter what carrier you have. Its the strongest, cheapest, and easiest locker out. Why everyone uses it, Ford, Dodge, Jeep whatever....