Tire Size and Fitment for 74 Plymouth Satellite Seabring?

[twindragon6]

What is the widest 15" rim from Wheel Vintiques that will fit on a 74 Plymouth Satellite Seabring without modification?

Somebody said that 15"x10" will fit in the rear? What backspace?!? 5.5? 4.5?

Possibly the 15"x8" 4.5" backspace in the front?
Search results for: '54 Magnum 500'

 

[74gtx]

I’m not sure if 10” would work but I know 8 “ with 295 50 is as wide as I can get on my 74.