I didn't mention this because it was irrelevant to this thread, but I 0411 swapped about a year ago. The ECU will have nothing to do with the transmission for a swap such as I did or what you're mentioning. The TCM I bought says it will run any 6L behind any motor and will be the sole controller as long as it has a tach signal and tps signal.Not to hijack your thread, but what are thoughts on running a 6L80e behind an L29 using a 0411 computer to run things? Can it even be done?
If things work out on my end, I would surely like to know what a 454 in front of a 6L would do! I mentioned the torque being utilized better in each gear from a 350, I could imagine a 454 would be dramatically better imo.