I just found out from a poster on another forum that indeed an LS motor fits without modification in the frame of a 48 Plymouth. So with the fitment question answered, I now pose another. What if any of the wiring would I need to discard if I used the entire harness? I'm talking headlight to taillight. I'm suspecting the anti-theft and if present the power window/locks and other accessories could be chucked but since I'm not presently familiar with the systems would it be feasible to just leave those unhooked and not affect the computers programming or functioning of the drivetrain or throw codes and lights at the dashboard? Thanks again.