Hope it works for ya.
There'* another trick, but its been so long using paper clips on my 87 I can't remember how it goes. Something about being able to keep the torque converter locked in 2nd and 3rd gears. Not sure which terminals to jump to do that. I have it programmed in my ECM chip to do that anyway in race mode.
It locks the converter up, no matter what the TPS tells the computer. Normally it doesn't lock unless it hits a certain speed or the TPS is below a given %. Works great at the track, wouldn't be a good idea on the street though.
One of the "nearly free" tricks on OBD1 cars is to wire a 3 position switch into the ALDL. One was stock (off), 2 was to turn the fans on, 3 was to lock the TCC when making a run. Old school (well, OBD1 type of old school) hot rodding.