The 65-70 B body rear end is 65.50" drum to drum. Frame rails near the rear tires are about 51.50" at widest point. Wide Track Pontiac! Sure does make it difficult to find wider than stock wheels, because the backspacing\offsets are usually not deep enough. I am currently looking to stuff a pair of 20 x 9.5" wheels I got a killer deal on, but of course their 5" backspacing puts them 2" from the frame rail and zero inches from wheelwell lip, and thats even with it rolled up...not good. Only solution is a narrowed rearend.
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Red\black 65 Grand Prix 467 E-head stroker, Viper T-56 6-speed, 4.10 spool
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