Engine swap/wiring harness question

I have a 1995 Fleetwood and the engine just blew. I have a replacement LT-1 that I pulled from a running and driving 1995 9C1. When I pulled the 9C1 motor, I left all the harness on the engine, and just disconnected the big plugs on the passenger side kick panel, and it was very easy to remove. Would this be the best way to do the swap, or are there significant differences between the Fleetwood and Caprice harnesses, and perhaps I should just leave the harness on the Fleetwood, and unplug everything at the engine? I'm doing the swap tomorrow, so any help is appreciated!

Chad