I got a great deal on a 2k4 mach that had been rolled, I do not know is it was manual or auto.

I plan on replacing the crank with a forged unit if it IS auto, before dropping the 4.6 into a 67 fastback.

my question is:

what do I need to do to the engine harness to make the computer stop interfacing with the auto transmission? Id like to run a 5speed manual.