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Old 09-29-2015, 04:17 PM   #5
GMC-YA68
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Join Date: Mar 2004
Location: Lee's Summit, MO (KC)
Posts: 742
Re: How fast can I cruise?

I was running around 2700-2800 RPMs with TH350 and 33s w/ 3:73s at around 75mph.

Your sig says 10 bolt rear. Are you sure you are running 3:73s?

Check your fuel hoses at the tank. I've seen multiple stories where they have been kinked, rusted, dirty, and only allowing "X" amount of fuel to the engine...
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'72 Jimmy 4x4 - 5.3/4L65E/NP205 swap
http://67-72chevytrucks.com/vboard/s...d.php?t=663780
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