Will 33x10.50-15's fit on my stock 1994 Silverado K1500 4x4?

I have done a 1.5" torsion bar crank on the front and had it aligned.My factory size 265-75-16's are done for after 60,000 miles and I have decided to buy 33x10.50-15 BFGoodrich all terrains to put on the 15x8" wheels I ordered.The wheels have a 4.5" backspacing(not sure it matters)Anyways will these 33's fit on my truck with the extra 1.5" I got out of the torsion bars?? Any help would be appreciated.