hey guys im jim,i own and tune my 94 z28,shes a blown lt4, with le trick flow heads ,intake,custom cam,pro charger,with a th 400 amd 3800 stall,i had to learn to tune because the only dyno here didnt know how to tune obd1 gms,i started out with lt1 edit!!and free scan, ive been out of the scene for a couple of years due to an illness,but now im back into tuning so i my ask some dumb questions for a minute!!