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Re: Need some real numbers, MPG...
I will be able to report back after we start on the power tour. In stock form I did pretty good 18 - 20 but after a cam it dropped now I have a turbo but I am hoping that doesn't hurt during normal highway driving. I have also added a T56 but lowered my rear gear to 4.11:1. Time will tell.
These trucks are heavy and the frontal area is huge, the drip rails don't help matters any. Realistically I would love to pull over 20 mpg and it might be possible but speeds over 70 I am afraid we will run into that wall. I believe I have things dialed in good for this trip but again with my weight I bet I will still suffer.
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Dave
1968 Custom Chevy with turbo charged 5.3 gen III 4l80e swap
1967-71 GMC 3/4 ton long step 4x4 (not sure what year exactly?)
"A good friend will bail you out of jail...but a true friend will be sitting next to you saying "that was frekin awesome".
"If it doesn't fit force it...If it breaks then it needed to be replaced anyway!"
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