I don't know/think so, there shouldn't really be much "engine" wiring that runs to that side as most of the engine harness goes to the ecu/mpi. I think its all a/c, lighting, fuse power, etc that comes in on the drivers side..

What parts of the engine harness goes that way that you can see since you have the harness already? I have only done swaps on the carb'd trucks and I don't really remember any of the engine harness running to the drivers side