i have a basicly stock 350, 700r4 auto transmission on a 1991 camaro. When i had the 87 harness in the camaro i could burnout like no tomorrow from first through second and when not burning out and i hammerd on it and it would shift from first to second it would spin the tires also. now with the 91 SD harness it no longer burns out and rarely chirps the tires when shifting into second. Attached is the Data file from datamaster 8Dv351 of my car, im just now learning and reading about tuning and have all the tools to do it. Any sugestions??

so far i have been talking to lou who has been a great help, he said to post up here and see what others think..
he said this..
Looking at the data, it looks like your spark retard is kicking in for some reason. But the knock count does not go up, that's strange. I compared it with my acceleration data and mine shows spark advance of up to 40 degrees while you're staying at 20 degrees which would definitely account for some loss of power.

uploaded my uni file inside the zip folder
anything will help!! thanks in advance