If you are going to go through the cost of doing that, and you want to stay a V-6 I highly recommend saving a little extra and getting the heads/intakes ported and polished...you will probably need a new clutch, and injectors and I would recommend a 155lph fuel pump, if not the 190 unit. Since you got everything tore down I think it would be good to get a custom ground cam from Crane or Comp cams, and new valve springs and roller rockers! I mean if you are going to put that much cash into this project you should do things right the FIRST time so 6 months down the line you don't kick yourself for going cheap. You will also need new fuel lines. I am pretty sure the 99+ cars have a returnless fuel system. Remember with everymod that gives you the kind of gains you are looking at you need a strong supporting cast of parts! Get a strong clutch because I am sure with the parts listed above you will be close to 250 Flywheel HP!!!