Old member with a new ride.. Plymouth RoadRunner

[Blue70]

Well I sold my 70 Camaro a few years ago and have gone through a few cars since then, but I recently had the opportunity to buy back my old 1974 Road Runner that i restored back around 2001 so I jumped on it.

It’s a 1974 Plymouth Road Runner (yes it’s a Road Runner not a Satellite)
It has a 383, 883 4 speed (with pistol grip) and an 8-3/4 rear with 3.91 gears.

I am looking to upgrade the suspension, brakes, and most importantly the wheels and tires..

I know it’s a long shot, but these cars have HUGE wheel wells, does anyone know what width/backspacing and tire will fit back there?

Anyway..here's a few photos of how it sits now (sorry they are not the best.. I'll get some better ones soon)