Center Line wheel question

[GN/GTO]

Wanted to purchase 15x8 1/2" Auto Drag wheels for my M/T 28x10.50 slicks. My question is about the back spacing, they only offer 3 5/16 or 4 7/8. My current wheels are American Racing 15x8 they have a 3 3/4 back spacing with the M/T 28x10.50 on them. I have about 3/4" clearance from tire to frame rail. I would guess the 3 5/16 back space is my only option. giving me more tire to frame rail clearance, but where is the tire going to end up in relation to the outside of the wheel well?

 

[GNVYUS 1]

I have the Polished 15x10 Auto Drags and with a 4.5" B.S. I can fit a 295/50 on with only a fender rolling. I have aluminum brake drums but you probably do not need them as they never rub on the inside or outside.