first, you're not really supposed to be switching programs while under power, or while moving at all for that matter. but do what you want, i'm never on any roads in IL.
second... when i ordered my chip, jody's other employee guy (can't remember his name) told me that since i had the 6spd, the 80e and 80t were the same program since they differed only in tranny tuning. however, from what i've read lately, it seems that maybe tow has more power at lower RPM. If this is the case, i wish i had gotten the 80 "tow" instead of 80 "econo"....but maybe 80 "econo" works better for MPG and daily driving. maybe diane can chime in?