I did the electric fan conversion a few weeks back using the Grand Cherokee fan (followed the thread on here for this)
This fan looks like it was made for these trucks and I used weather pack connectors from these guys to make it easily removable and like it was made to be there.
http://www.k-four.net/Product.aspx?pid=196
I am slowly going through the truck and upgrading all the wiring, installing these type connectors and relays for lights etc. Removing the seemingly hundreds of butt connectors, wire nuts and taped connections installed over the years. All connections will be soldered and heatshrunk, properly wrapped and secured.