I plan on doing similar stuff to my car this offseason, most importantly a cam upgrade (TR224).
I'm also going with the ls6 intake, and i'm doing the ls1 to ls6 PCV conversion, it might cost more money than its worth, but since i'm in there, i'm doing it anyways, here is a kick ass guide
http://www.ls1howto.com/index.php?article=...4b84b77cf98f1c9 What mods do you have done to your car?
I'm also installing a LS2 timing chain, they are around 30 bucks, and beefier than the ls1 chain, direct swap that uses the same gears.
also, i know my 98 has a history of oil pump failures, i don't know about your car, but i'm also upgrading to an ls6 oil pump. there are alot of fbody places that sell ported, polished, shimmed ls6 oil pumps out there for like $150, i didnt opt for that, figured the ls6 pump will work good for the money for me.
at the moment i cant think of much else, but oil pump and timing chain are pretty much cheap insurance imo, especially for my car which will have a bigger cam in it.
while your in there, check out your belts, and how often do you flush your coolant and ps fluid? i''m sure you'll flush your brake fluid with your new brakes.
Miki