FIVE0GIRL, If the car was not made in california there will be a difference in the wiring harness'es, in California both of the 88 and the 89 were mass air so they use the same harness, if it isn't a original Cali mustang then the 88 will be for speed density and the 89 mass air. You didn't say if your car was 88 or 89 and are you building it from scrap or converting to mass air or what? Details!!!!!!!???!!!!!Good Luck
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88LX NOTCH 5.0, TFS Twisted Wedge Aluminum heads, 2.02 1.60 valves, BBK shorties unequal 1 5/8, off road H-pipe, Flowmasters, Drag lites, custom grind cam, solid motormounts, Aluminum Driveshaft, BBK springs, lakewood 90/10 50/50 shocks, BBK upper and lower control arms, 4.10 gears, centerforce DF clutch, adjustable BBK clutch cable with aluminum quadrant, Billet Steel flywheel, 70mm Acufab Throttle Body,MAC cold fender mount induction, K&N, 3 core radiator, flex-lite-fan, custom hardened push-
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