A 3500rpm stall would really affect driveability. Would kill gas mileage too. Seems like your compression is a little low on that motor too.
What kind of condition was the engine in when you put it in the car. Not all 5.0s are created the same. My car only ran 15.1@94mph when it had 3.73's flows and a k/n.
But it shouldn't be that slow off the line. Did you try doing the timing like I said?
Run 32-34 total. All the time. I did that on my car, really picked up down low. I really can't see whats holding it back otherwise.
Skyler
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1989 Saleen Mustang #406
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TFS Heads, Edelbrock intake, E-303, 3.73's, 1 5/8 shorty headers, Offroad-Hpipe, 2chamber flows, 36psi FPR, 32deg timing w/ spout out, 70mm tb, 73mm maf, 24lb injectors, K/N, March Crank pulley, MSD6a, 9mm wires and FMS Aluminum driveshaft.
Best ET 13.2@106mph (untuned)
Gtech 14.1@112mph
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