4.5" or 5" backspace should do ya. here's a solution to the 18's or 20's ?....... 18's in front and 20's in the rear. 
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85' SWB, 4.3/TH350, getting ready for paint
84`SWB, 462ci./TH400, cowl hood, 15" billet spec., flows, blazer buckets/console, flat black
71`SWB, project
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Last edited by CHEVYE; 06-16-2005 at 04:24 PM.
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