I did the same thing, it is very easy, it just takes time. I went as far as taking all the emissions wiring out of the harness. is it a 2.0 or 2.6, mine was a 2.0. It is pretty easy, when you get the weber pull your old carb off, every single vaccum line (Exept the brake booster and distributor) can be taken off. With the carb off you should be able to see where every line went to, remove everything a vaccum line went to (Exept the brake booster and the distributor), then remove all of the emissions wiring by taking the tape off the wiring harness, and looking under the kick panel on the passenger side to see what wires need to be removed, there are alternator and windsheild washer wires that run through the same harness, dont remove them, tape it back up, then put your weber carb on, connect the weber power valve to one of the open vaccum ports and then connect the distributor vaccum lines to the port, block off the mechanical pump and install an electronic pump near the fuel tank.

That is exactly what I did, is i just went on a rampage taking every single little vaccum controlled mechanisims out (Have done it on a 2.0 G63B engine and a 1984 2.4l 22R), put the weber on and hooked up the total of 4 vaccum lines (oh the PCV has a vaccum line also, leave that, I didnt do it in my toyota and I damaged some seals and it now leaks oil)

I have done it, it is easy, it just takes time and common knowledge on how the emissions system works

Not my pic but hopefully this is what it will look like when you are done