Need Help! Passenger Tire Moves and Rubs Fender. '68 Dart GT

I have a 1968 Dart GT. I had the car converted from 14" wheels to 15". All new front components, brakes, arms, etc. I took it to GOODYEAR TIRE for a front end alignment. They shimmed and got the driver side in 100%, however they said they could not get the passenger side in alignment. Funny... they still charged me the same price as if they did... i got home and noticed that you can pull back or go forward with no issue, however if you turn the steering wheel full right, get out and measure the distance between the tire and the fender there is a 4" gap.... no where near rubbing yhe fender. If you back up about 7 or 8 feet the Tire "Moves in toward the fender" that 4" and is now rubbing into the Fender! Pull Forward and the wheel moves back OUT and is again 4" away from the fender.... again having the steering wheel full to the right. If the GOODYEAR Pros at the tire center can't figure it out, can anyone give me an idea of what is going on and who I can take the car to in order to fix it???