hey i had a couple of stangs two of them with 373 and one with 355 i like the 355 with 373 u have to push the motor to the top of the rpm to make through the traps a stock motor only good to 5200 any way by the way all of are cars have ran low 13 with stock motors no port work but one had 410 and it picked up with 355 but 373 or 355 are great gears and there is only a few hunder rpms diff between gears in 5th
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