Does anyone know what belt to use when removing the AIR pump? What should be done with the two electrical plugs that run to the ECM? What size plugs fit in the exhaust manifolds? How shall I close off the pipes down to the cats?

 

http://www.thirdgen.org/serpentine

This is an article about the serpentine belt, which to use, and how to rout it. I am unsure about the rest of the information you asked for, but if you do find it, post it, as I also want to remove my AIR.