One of the best gas mileage improvers I can think of is a simple vacuum gauge. Mount it in the driver's line of vision out of the windshield, and practice moderating the throttle position to keep the vacuum as high as possible as often as possible. Just a tiny bit of heavy right foot will cause the power valve to kick in and cut the gas mileage in half, or worse. If it's just impossible to keep the vacuum up in the cruising range, it's time to downshift - - - - -which is something the OD transmission fanatics just can't seem to process. There's a reason these old rigs were produced with a rear end ratio beginning in "4". Stacking a T-5 transmission in front of a 3.08 rear end ratio and pulling them with a low-torque engine, and expecting good fuel economy is an exercise in stupidity.
Jerry
