Anyone know how to lower a 91 D350 Reg Cab Dually?

 

check these out and see if it helps https://www.dieselbombers.com/5-9-li...t=lowering+rig by nccummins

 

Thanks, but Im hoping to find something somewhat year specific. I may just have to do a full bag setup in the rear, with big firestones.

 

Try this one... second page.
https://www.dieselbombers.com/1st-ge...cummins-2.html

 

Cool, thanks. I want to make sure I keep the payload.

 

Yeah, the factory puts as many leaves in as there should be for a functional truck. Keep track of your progress and take pics. Good luck!

 

On mine I cut 1 coil off the front spring on a cummins I'd try 3/4 of a coil.(I didn't like the heat idea!) On the rear I flipped the front mount and added 4" to the rear shackle.The pinion angle is crap and wheel hops under acceleration.The axle housing sits way to close to the frame for heavy loads.I would try 2". On my friends 1/2 ton we put the rear axle on top of the springs and used Mopar car 8 3/4 shock plates.The stock shock's worked and we were able to set the pinion angle.The axle is also too close for any load and we are going to notch the frame. These trucks are a 74 and a 87 and have a similar frame and spring design just lighter duty.