very cool

i just did the same type of thing (except for on efi which is totally different) i was getting about 13-15 mpg on the highway with my 94 22re that has been converted to a 4wd sas from 2wd. it used to get about 20 mpg before the swap and ever since i sased it has sucked the gas because of the gear change. i had the afm richened up a click before i did the swap to compensate for the larger exhaust and header so i decided to try to lean it out a little bit and adjust the timing accordingly. im running 5.29's and 35's so my rpms are slightly higher than the stock ratio would be with stock tires and 4.10's and i figured with the aem a little fat it was just buring it off faster. bottom line is i bumped the timing to about 8btdc shorted and went 4 clicks lean on the afm and my mileage came back to about 18-20 highway mpg.

not the same thing as you but a relevent increase considering the fuel crisis..

ALSO BEWARE OF ETHANOL, IT WILL CAUSE PROBLEMS, ESPECIALLY BECAUSE IT ATTRACTS MOISTURE. YOU WILL NEED TO CHANGE YOUR FUEL FILTERS MORE OFTEN DUE TO THE HIGHER ETHANOL CONTENT OF TADAYS FUELS. it is corrosive too.