‘71 340 Duster Front Drum to Disk with Factory 14” Rallye Wheels - Problems

Your welcome. I think your cheapest route would be to find a pair of factory 14" sbp rallys as you already have the trim and rubber for them. Gotta be some floating around out west ?
Yes, that’s my first option but Cass at DoctorDiff is not sure they will clear the caliper he has supplied. He is going to verify that.