Looks like fun.

I had the same amount of fun with my 2000 GMC 1/2 ton. I had found some nice step by step instructions on the net that made it much easier. However, it still isn't something I would like to do if I don't have to.
The only luck I had was that my truck was a V6 and a manual transmission so the space under the hood was plentiful and my steering column had no shifter linkages.
But I also reused my connectors without any issue. I didn't know how to remove them from the metal lines of the heater core at first, so I cut the heater core lines and then figured out how to remove the couplers. They weren't leaking after I put the new unit back in. I drove the truck for another 5 months or so after that and had no issues.