My mind is now blown. I spent a year trying to burn a new chip for my '92 k2500 and couldn't figure out what I was doing wrong. Perfect timing, too, since I just rebuilt the motor. Any advice for me, I'm still a tuning virgin technically lol. I'm a bit of a nerd tho so I should catch on fast once I get burn to actually work. 357-flat top pistons, ported stock truck heads, 2.02/1.60 valves, summit 1103 cam(288/298 duration, .444/.466 lift) roller rockers, torker2 carb intake, 454 tbi (I got 65# and 80# injectors) and short tube headers (for now). 4l80e stock trans, 4.10 geared 14bolt.