I've been through the wheel deal with tires and what back spacing to use with 1/2 inch clearance on both the front and back side of the tires and wheels wrench
Are you going to leave the stock wheel wells and outer 1/4 panels stock? What year Duster?
Answer these questions and we can talk more with better, more accurate, answers up
The stock 8 3/4 housings for the Duster and other A bodies is right at 51 1/2 inches wide from the outside of the wheel bearing flange that the brake drum fits against to the other side, how wide is yours now ?

Last edited by Cab_Burge; 12/30/20 06:42 PM.

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)