Re: Better Gas Mileage Ideas for Classic Chevy
A Th350 with a 3.08 gear will do almost as well as a 700R4 with a 3.73 and save you a couple grand as well.
I have a carburated 350 with a 700R4 and 3.73 and get 12.5-13 city and 15-16 highway. It's about the best these aerodynamic bricks can do.
If you want to spend some big money, a 5.3L/4l60/with a 3.42 rear end will probably get you 14 city and 18-19 highway.
I think the best option is a small diesel with a 5 or 6 speed. I could see that easily pushing one of these trucks into the 20's. But again, very costly???
Last edited by 67ChevyRedneck; 01-05-2008 at 10:28 AM.
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