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Need sbf 1\4 mile gear recommendation..4.30 or 4.56

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4.30 or 4.56

My mustang is a turd off the line and needs gear change recommendation.

Combo...427sbf, 641 peak torque @ 6200 & 800+ hp @ 7500. 2800lb, th400, 4.10's w\29" 1.37 60 ft. Converter is an 8" UCC. Car only ran a 6.0 @115 in 1/8th. Tried launching @5500 & 6000.

Trying to figure out a max effort 1/4 mile grear for 8.8. 4.30 or 4.56.

I don't any data or trap rpm. Only made two 1\8 passes on new combo.
 
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