03 Silverado
First question is will the 4l60e trans bolt up and work on the 5.3 without changing the flywheel or torque converter? Or do I need a 5.3 torque converter? I honestly plan on upgrading later for the 4l80 or manual swap it but that's another day.
Also I have the wiring harness from the 04 truck that I took with the engine, should I use this harness and convert the truck to dbw or would it be easier to stay dbc and get a new harness? I do have the throttle pedal and module as well. Also have the ecu too.

