is that 39 with the vacuum off or on
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1991 Mustang Gt,TCI AOD Streetfighter Transmission,Mac Chrome Headers,Mac air induction,3.73 gears,H-pipe,2 Chamber Flowmaster Mufflers,75 bullet mass air,65m Throttle Body, NSCA S/ET 7050,Best Time 13.47 1/4, 8.47 1/8
P&V Racing