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Home » Public Forums » GMCnet » 3000 RPMs at 70- a little much, 3.7 final drive ?
3000 RPMs at 70- a little much, 3.7 final drive ? [message #360333] Sat, 28 November 2020 14:25 Go to previous message
hertfordnc is currently offline  hertfordnc   United States
Messages: 1164
Registered: September 2009
Location: East NC
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The final drive had been upgraded but he PO was not sure to what.

FInally got enough things right for a short high speed run- 70MP by GPS app was about 3100 on the tach (and the speedo was reading a little low)

So that comes to 3.7 with 225/75 tires

That seems a bit excessive.

I'm thinking for a 23 footer not towing anything heavy 3.21 or 3.55 might be a better option.

A lot of my travel involves I95 in the South, lots of flat cruising.

What's the point of having a 70's muscle car if you can't enjoy 70's freeway cruising?


Dave & Ellen Silva Hertford, NC 76 Birchaven, 1-ton and other stuff Currently planning the Great american Road Trip Summer 2021 It's gonna take a lot of Adderall to get this thing right.

[Updated on: Sat, 28 November 2020 14:26]

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