Time to Buy Tires for the Duster......help please.

Time to purchase tires for my 1970 Duster build. Rear and front suspension is factory. 8 3/4 rear. Manual disc brakes front. 1+ rear springs.
I will be running 14 x 5.5 Rallyes up front and 15 x 7 with 4.25 BS in the rear. Like the look on Polyglas but can't bring myself to pay the crazy money for them. Have decided to go with Goodrich T/A's for retro look and radial handling. I'm think that 225/70R-14's should work up front without interference issues. Would 255/60R-15's work on the rear without rubbing? I'm not looking to go crazy wide I just want to fill the rear fenders.
Pics would be graet if somebody has this combo.