purple wombat

need to know the minimum inputs necessary into PCM for a 2010 accord v6 exl. Planning on using speedometer, tachometer fuel, temp gages from Accord. Will use fuel pump from accord. Will use accelerator pedal from accord. Have complete wiring harness from entire car, and would like to start stripping out wires to/from evap canister, SRS system, door and seatbelt interlocks, ventilation system, lighting, but I am taking a "go slow" approach to doing so until I have more info.
Using accord engine, driveaxle, subframe in mid rear position in a Triumph Spitfire