could be interesting on a 95 tbi. on those trucks you need to see what motor you have to see weather you have obd1, 2 or inbetween. i think i heard possibly mach performance may do something. its been a long time. if you have the computer under the dash, there maybe something. try emailing the chip companies in the magazines or doing a search. maybe someone knows something, its been a long time since i lookin into them (no longer have my 95)
also, go to s-series.org. do a search on OBD-1, OBD-2 or obd2 or obdII things like that in the search area, there was some discussion about these there a long time ago.