Lightly modded is everything outside the motor, exhaust intake gears and tires. Heavely modded is heads, stroker, NOS, Cam and things like that. Those LS1's are deep under the dash, anything done to the motor is a heavy mod, either on your hands or your wallet.
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1989 Mustang Coupe.
Trickflow upper end
Vortech Supercharger
Lots more....
Best so far on ET Streets:
12.11 @ 117.7 Mph
1.84 60ft
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