5.2 5.9 magnum EFI plug and play harnesses

To recap:
1) you need the crank trigger to operate the stock ECU which means that you need to use the tranny that came with the magnum or install the crank trigger setup the ECU is looking for
2) The discussion above about difference between balances between magnum/LA are relevant to the 5.9 not the 5.2. Believe that the 5.2L is internally balanced so that any LA tranny setup (auto or manual, big or small flywheel) should work.

Bottom Line: to use this harness, you must have have the correct crank signal.