I spent ~3 years tuning my L03 firebird with the $61 code 8746 ecm so I'll take a look at it and see. I also have a bin that I read from the original prom in my ecm. It was a factory 5-speed car that someone had thrown a 700r4 in sometime before I bought it. The car ran fine with the original prom still installed save for the fact that it had no TCC lockup. I'll d/l your bin and take a look and also post my bin for you to compare.
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