I ended up with 5" backspacing accidentally. I thought the wheel had a -12 offset but it was +12. duh. So I have the cragar soft 8 in 16x8, with a 5" backspacing.
I have no rubbing on any control arms, even at full turn. I am running 35x12.5 tires on the wheels. I have a 3.25" Rusty's lift and full Teraflex flex arms (all 8).
I have flexed it and there is no rubbing but it was on a ramp. If I go on the trail, disconnected, at full stuff, AND full turn, well I'll just cross that bridge when I get to it...haha...
The stock wheel had 6.25" backspacing. The tire width is adding 2.5" over stock, which is 1.25" per side, which means the back face of the wheel should be 1.25" further out, which is exactly what 5" backspacing does. I guess people recommend the 4.5" as a safety thing? Because according to the math here, the inner face of that tire is in the exact same spot as stock when you have 5" backspacing.