Tire size for cobra r's on a 90'

[Mike_W]

I bought the 17 x 9 fake cobra r w/5.95 back spacing. I looked at afs websight and they had a fitment guide, 5.95 b.s. in front and 5.95 b.s. in rear(for drum conv.) 6.42 b.s.(for rear disc conv., because axles are longer for rear disc). The distance between rim & tire to inside wheelwell & quads is close with the more backspacing it would be closer. Whats this rolling of the wheelwell? Is that because the tire will stick out a little bit and it might hit when the rear is supressed? How would I get this done? Body shop? How much?

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90LX, T-5, Vortech V2-SQ, Holley, Twisted Wedge Stage1, X-303