Whats your engine specs and gas mileage?

[jku72]

I am sorry if your trucks get bad gas mileage. If you spent as much energy going for good mileage, as you did for speed, you would see it is not only possible, but higher figures are also possible. Try running synthetic oil, and tuning the engine for maximum mileage. I run an accel HEI in both trucks, and opened the plug gaps to 55 thousanths. On the highway, keep the throttle position constant, and, if you go on long trips, advance the timing a hair more than you would for around town driving. And listen to Bush, keep the tires full, plus 5 pounds. It is possible, and not to hard to achieve. Headers, as you know, work great as well, along with an h pipe, and duals.
I also have squeezed 19.8 mpg out of a 67 catalina, with a 400 cid and t-400, with 3.08 gears, but the true secret is compression ratio.