Numerically higher rear end gears.
3.73's are a minimum, but it seems that a lot of people have been going with 4.10's lately. Several company's make a 3.90 gear also, which might be a good compromise.
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'97 T-bird LX 4.6L 2V, auto
SVO heads/intake, Vortech T-trim, front mounted intercooler, blower cams, Cobra crank, Manley H-beam rods, JE pistons, Aeromotive fuel system w/ 42# injectors, and much more
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