I saw a pretty big sotp gain, but it was mostly useless lowdown torque...ran it at the track...ran it back to back once w/ the program on, one w/ it unprogrammed....no differance in times..only reason i bought it is because ex paid for it and I needed it for my 373's...use the money towards a nice set of long tubes instead

 

The power programmer is great if you don't intend to add N2O or a blower or a cam or basically anything that will drastically change how the car runs. I've got one for a 96-97 OBD2 that I'll let go for 200 + shipping. Nothing wrong with it, works great, but doesn't work with my OBD1 conversion.