not sure why a 7x15 with 3.75 bs won't work? or why it hits the caliper?
I have run plenty of steel spoke wheels with 3.75 bs

must not be a mopar slots or 4" on 5 wbp maybe? sure they are 15" ?


I run 7x15 with 4.5 bs weld rims up front with 235/75/15 tire

I have had 7x15 steel spokes with 4" bs also

I have a set of 4x15 with 1.5 bs 165/15 tire

I have seen 10x15 4.5bs on the fronts with 295/50/15 tires...now the stick on weights hit the caliper and had to use bead weights.

I have a set of 10x15 with a 30x9.50x15 tire on the back of my stepside stock width rear axle. so a 8.5 rim 4 or 4.5 bs should fit the rear.

10x15 7.5 bs 325/50/15 M/T with stock width axle & tubs.

I find that 4.5 back space works great on the trucks.

I tubbed my 88 440 truck and used an A-body 8 3/4 to tuck a 12x15 rim 4.5 bs with a 325/50/15 M/T in the fenders.

even the 7x15 4.25 bs cop wheels should bolt right on that truck.

check & ID the wheels