yes 10.5 is too high for a supercharger. I around 9.0 to 9.5 is about as much compression as you can have and easily apply boost to.
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'89 GT
K&N, Twisted Wedge heads, TFS intake,FMS 1.7 rockers, Trick Flow stage 1 cam(221*/225* .530in\.542in) , 3.73's, headers, off road H-pipe, Flowmasters, FMS Clutch, Tremec, PRO-5.0, FMS driveshaft, fluidyne alum. radiator, and more to come.
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