There are shock extensions for the shaft, look at truck accessories to find them.
(EDIT
Be careful not to go too long, if the shock overextends, the spring can pop out.
Don't use poly shock bushings either. The hard rubber ones are best.
An adjustable shock is the way to go, but, obviously, there's a considerable cost increase.
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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