I am ready to set my 2019 L82 5.3 in my frame. I have a new 6L80 (4x4) transmission but am waiting to have it converted to 2WD. Can I use an old 6L80 that I'm using for parts to just mount the engine and tranny together and wiring harness for trying to start and tune the engine or do I need to wait for the transmission that will be in the car?
I would really like to make sure I can get this thing fired up and final tuning for the engine completed.