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Old 08-27-2011, 09:40 PM   #5
Longhorn Man
its all about the +6 inches
 
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Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
Re: Trans and rear end help

if 55 is your top speed, then your engine is sick.
a TH350 won't help.
If your rear is original, and not oprioned otherwise, then you should have a 7.73 gear out back.
A 3.07 will get your RPMs down considerably, and down into the torque powerband of your engine. You'll be spinning 2500-ish RPMs on the freeway at 60.
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