I started the intake manifold swap last night. So far it has been very straight forward. I pulled the old power steering pump, disconnected all the vacuum lines, and electrical connections, pulled the throttle body off, pulled the fuel injectors out of the manifold ( left them connected to the fuel rail), and then pulled the manifold off. One word of advice for doing this is to have long arms the 4 bolts under the manifold can be taken off from the engine bay with a little contortion.
I cleaned the "new" manifold up a little and I was surprised by the amount of gunk in it, but it wasn't much more then the amount of gunk in the one I took off of my YJ. I guess these engines just create a lot of carbon build up. After seeing how much there was on the stock manifold with only 66k, I'm going to spray more intake cleaner in my XJ with 196K.
I bolted the "new" manifold up, attached the fuel injectors, installed the throttle body, and installed all electrical connections, and most of the vacuum lines. I have to buy some T- connectors and a small chunk of rubber hose to connnect all the vacuum lines. I am going to rent a Power Steering pump pully remover today and swap the pullies from the original and the new one, this is only needed since the new pully has two chunck of the edge missing, and my original looks fine.
I don't think my stock belt will fit, but once I get everything bolted in place I'll check it. I'm going to replaced the belt either way since I have never replaced it, and it might be the original and 17 years old.