Another (will this fit?) Wheel and Tire ?

wes beem said
the rearend is an 8 1/4 from a 73 V8 Duster. I know because i called the junkyard today and ill be picking it up monday. If it doesnt have disc brakes and BBP it will when it goes under the car.

Now my main concern is how WIDE i can go in the back, I dont care if i have to go with a skinny pizza cutter up front because thats totally my diggs visually, Im mostly concerned with getting the absolute fattest tire i can fit out back with these style wheels and if it sticks out past the fender well thats fine as long as it doesnt rub.

I think you're missing the point. It doesn't matter how narrow the tires are, the rim itself is going to stick out really far in the front. And then there's the rear tires- there's only a couple of tires that come in a 15" rim that are available in a 255 or 275. If you match that up with the front tire, the only thing you can run is a BFG T/A and the only size that will even come close to working in the front is a 195/60/15. Which is only 24.2" tall. The tires would be in about the same spot as the outsides of my 275/35/18's, and the rims would stick out a 1/2" further. And you'd have bitty little 24" tall front tires.

In the back, an 8 1/4" rear is about 1" narrower than an A-body 8 3/4 with BBP axles. So that means knocking a 1/2" off of the backspace you'd typically run with a BBP 8 3/4, which would mean you'd be looking for a 15x8 with about 4" to 4.25" of backspace. If you add disks to the rear it will widen the track by another 5/16" or so per side. So, that would mean a 15x8 with a 4-5/16" to 4-9/16" backspace to center up a 275/60/15. If you run a 15x8 3.75" that tire is going to be sticking out a good 1/2" from where it needs to be, which means it will be into the quarters because there's no extra space with a 275. Only way around that is to raise the rear end, which means modifications. Running SS springs, or air shocks (stupid), or cutting back the quarter lip. Otherwise it will rub, because it will not fit inside the quarter.

You'd be way better off picking a different wheel that you can get in a better backspace for both the front and the rear.