Rear end rubbing, HELP!!!!

[bugmasta]

Got my boss 338 installed today with what I gathered from everyone on the site as correct tire choice of 295/40r20 for the rears and they are rubbing super bad. I have a 72 rear end and I measured it and got 57.25 backing plate to backing plate. I have adjusted the pan hard bar and I am getting rubbing on both sides still. I thought about spacers, but then I have to install new studs. Anyone have any ideas or suggestions.

Was supposed to drive 120 miles to a show tomorrow but I am seriously thinking I will be putting my old wheels and tires back on.

Anyone else run into the issue of the tires rubbing in the rear with this setup? What was your fix?

I have a 4/6 static drop with shocks relocated and adjustable pan hard bar.
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[bugmasta]

Reading some other threads it looks like I need to find me some 1" bolt on spacers.
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