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Discussion Starter #1
I'm putting together another set up, 363 ci motor gt 47 88 turbo, th 400 trans, the car I am putting the motor in has 389 gear ratio, I am only planning to turn it 7500 rpm's...should I swap out the gear for a 355 or what do you guys think? planning to run 1/8 mile only...
 

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Id leave it and try it. Id look into a valve body thatd allow you to use the transbrake and launch from 2nd gear too.
 

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what size tire??? i went from 4.30 to a 3.55 and loss some 60' so i would run it and see. not like it will cost anything.
 

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Discussion Starter #4
275 60 15 dr
 

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If the car preforms up to its potential, you will want to go with the 3.55 because a 3.89 with a halfway efficient converter will cross above 8000.
 
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