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Re: 72 Blazer in need of advice
Guessing here but looks like a 4" lift and 33" tires? What size carb?
Do you know what gears you have? I have the same set up as you (lift, tires, motor/trans) and got 13 mpg with the old tired 350 (wasn't stop and go on the 5/405 freeway either). I haven't had a chance to check the new motor, I am running 3.73 gears. If I recall correctly, you will need to also install some 4.11 or 4.56 gears with the overdrive.
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