Hey DJorgie,
I did the same thing on my 95 GT. When you pull the pump itself, you can either cap the metal lines where they go into the pump or you can cut them about an inch from the exhuast pipe and fill it with the putty that turns to steel or jb weld. as far as the head, you can use a brass pipe plug found at any local auto parts store, check out their motormite section. I have a link to the one I used.
stallionmotorsports.tripod.com/id44.htm
Its about the same. As far as the belt, you can get a shorter belt.... I went from the stock 105K6 (i believe) to a 955K6 so its not too much of a diff.. but take sewing tape measure wrap it around the pulleys and you should be close, with it tight, get a lil smaller (remember the auto belt tensioner)
Hope this helps
~*Adam*~