Wheel and Tire Size with Rear Spring Relocation on 71-74 Charger

['72 Charger]

Indeed guys the search tool is our friend, but in the case of this question all it has done is complicated things for further.
The premise of the question is: all things being equal, having performed a leaf spring relocation on a B-Body what is the widest 15" wheel and tire combination that will fit within the unrolled factory fenders?
Numerous posts, on multiple forums, have conservative stated front-15x8 4.5BS with 245/60/15 and rear-15x10 5.5BS with 295/50/15.
I say conservative because I'm in the mock up stage of performing this modification and can easily see 265s up front and 325s fitting in the rear. Numbers and formulas seem sound, although, wiser men than me have commented on this topic with different yet similar numbers not as wide as the aforementioned.
Any Gearheads with this modification or knowledge thereof please chime in.

 

[jeremya72]

I was running that exact same wheel and tire combo on my 72 Road Runner. With the 245's on 15x8's there was a ton of room still up front, and the 295's on 15x10's out back cleared without relocating the springs. It was super tight though. You will definitely need to go with more backspacing to fit a bigger tire and take advantage of the relocation kit. My 15x10's have 5.5" of backspace and there was 1/4" or less room between the bulge of the tire and the unrolled fender lip on the one side and the leaf spring on the other side. In fact I had to move one of the spring clamp bands when I installed my new Mopar Performance leaf springs. I think with your relocated springs you could definitely fit a 325 with a little more backspace on the wheels. Good Luck!

 

[Hi-Beam]

Are the wheel wells the same on a 71 satellite 4 door as the 2 doors? I am planning on 295/50/15 on an 8 inch rim