Just crank your prop valve all the way shut then you might could burn em off. Mine were awesome til I did a brake test on gravel in two wheel drive then I noticed the rear locking up first.
That's how mine is. I checked it by blowing through it before I installed it. Mines backed out 8 turns in winter and currently 6 turns and all the way out is 10 turns.The knob is backed almost all the way out towards the little arrow on the knob that says "Less Brakes". If I turned it in it allows more pressure to be applied to the rear brakes, right?
Those JB7 calipers aren't going to work with a Dana 60, just take them back.
That crossmember is pretty standard on earlier trucks.
The NP205 is not factory to that truck, neither is a Dana 44, the 12 bolt might be.
Might be a body swap onto a different frame?
That seat is vinyl.
Martin
The JB7's will work with some brackets from a company called TMR.
I'll get under the truck and look at the frame horns.
View attachment 230557
Why spend money to downgrade???
Martin
Um kayFrame horns are closed in and rounded off like like the '73-'80's I've owned.
Um kay
Round front and open C on the rear I believe
Keep the 1/2 ton brakes booster and master cylinder?As for the brakes, I would go factory Dana 60 in the front, and JB6 in the rear. I've done that without using an aftermarket proportioning valve.
Martin