no problem, just find a very large tank to store thin air in and you can pull it behind your car.

seriously, i dont think you can.

installing a higher gear will help some. the later cars came with a 288 gear and the gas v8s had a 247. the taller gears will compromise your takeoff from a stop but will deliver higher mpg reliably. there is debate as to how much but it if you drop the highway rpm 10% for example you will get from 5 to 10% increase in economy. some folks think it will be closer to 5 i personally have changed rear ends about 6 times and i believe you will get close to the 10% for a 10% gear change.

as they say "results may vary".

but everyone agrees it is about the cheapest way to increase economy in an already good running car.

and your numbers look pretty good btw.

tom w

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.