I hope I can get some info here. I am quite new to engine programming and to this site... I have a 1975 k5 with a 1987 454tbi in it and I got a ebl flash ecm from dynamic efi for it. Mainly it was for basic stuff like setting idle the way I wanted since it was working against the torque converter even on idle, controlling cooling fan, TCC and so on. I found out that the later 454ss trucks had slightly more hp than the regular tbi trucks and the only difference I could find was a dual exhast and other timing. Then I thought it would be quite easy to just edit the stock truck configuration that was supplied with the ebl flash. But then I need to find the accurate bin for a 454ss with the 255hp setup. I searched this forum a bit and all numbers and so on just got me all confused... Anyone who want to help a tuning noob?