1972 Fury III Wheels and Tires

Hello,
I have a 1972 Fury 3..I'm looking to purchase new wheels and tires..I would like to have 15x7 on the front and 15x8 on the back. It seems most people are running 235 70 15 on front and 275 60 15 on back for the set up I'm looking at. The wheels I want in the back though only come in 4.25 back spacing. I know most everyone has 4.50 bs..Would this set up work? I called Summit Racing and they have no idea lol. If anyone has this setup please post pics. My other option is to go 235 70 15...

1972 Fury III Wheels and Tires
Author: Redd