see i knew everyone would through out useless info due to assueming you had an NBS truck :crazy:
like Gumbo said, the intake kits for TBI are a complete waste of money. i had one on my 94 and it barely did anything.
for intake, hypertech makes a few nifty products. look into a CFM-tech tb spacer too. i always wanted to cut up my stock intake kit and try to make a DIY setup with the hypertech parts(look at their website) and run some tubes down by the framerails to get cold air.
if you want to buy a stock 94 TBI intake setup to experiment with let me know

i still have all the pieces and a K&N filter(stock replacement)
for exhaust, a single 3 inch pipe with a high flow muffler will help out alot. as will a good set of headers. thorley and edelbrock make some good mid lenth headers. gibson, jba, edelbrock all offer shorty headers too.
you could upgrade some of the ignition. im not sure how those jacob's kits work. but i hear good things.
other good mods: pulley, e-fans, cam swap(will need custom tuning), and of course, NOS and a supercharger
good luck