tried and true, the edlebrock stainless steel headers from summit racing 1(800)230-3030 will work plus the figh flow 3" catco catilytic converter and lastly before they go completely out of stock the flowmaster 40 series original. this combo is great. it gives the classic chevy header flow sound and really opens up the top end performance. this is of corse in combo with a throttle body spacer and K&N filter system and of corse a power chip to round it all off. oh and don't forget the cheapest and greatest investment the 160degree thermostat which will trick your computer into thinking it needs more gas. and synthetic oil mobile one 10/30, chevy recomended. and the list goes on with out ever needing to change the internals. the next step would be the adjustable tbi regulator and higher flowing inserts.
hope this helps
summary
summit racing list
1. Edlebrock stainless headers with y-pipe
2. high flow 3" CatCo catalytic converter
3. 40 series Flowmaster original w/ 3" in and dual 2 1/2 out
4. low temp thermostat 160degree
buy all these at one time and the price they offer is the price. shipping is just an $8 handling fee to all of the items instead of each one if you bought them seperately.
5. tbi spacer
probably get it cheapest on E-bay look for the air-raid it has a cork-screw design which flows a bit better than the rest
