12 bolt question - Chevrolet Chevelle Forums

#12

09-20-2015, 09:41 AM

mestorod70 mestorod70 is offline

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Join Date: Jun 2013

Location: honah lee in a cave by the sea

Posts: 446

Just a quick note.
The 78 Z28 came from the factory with 3.42 gears for the TH350 trans
And 3.73 gears for the 4 speed manual.
I owned one with the th350 and it tach 3000rpm at 70mph with 255/60/15 BFG radials
Apparently GM thought 3 grand was fine for long trips with a stock motor.

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