I have an LS3 (Crate , mechanical/cable throttle) and currently changing the manual transmission to 6L80e. I am trying to find a suitable harness and ECM/Operating system to run this combo. Currently have a spare E38 ECM. Before this tranny change project , the engine was being managed by Holley EFI ECU (which can't run the 6L80).
Will appreciate any leads/clues. ....
thanks