I have the Pacesetter longtube headers (painted, not ceramic coated) and I think they are great for the price. I had no issues with fitment whatsoever. If you are thinking about installing the headers, I would definitely do it now while the engine is out. As far as the air pump, egr and other stuff, I live in Iowa where there are no emissions checks so for me it was a no brainer to get rid of all of it. It will throw codes, causing your check engine light to come on until you either get the pcm tuned or pull the check engine bulb (which I don't recommend).
1994 Camaro - 95' LT1 Swap: CC304, K&N CAI, Pacesetter LT's, Pacesetter ORY, Magnaflow Catback, AIR!, EGR!, A/C!, TB Bypass, Founder's LCA's, Panhard, Subframe Connectors and Strut Tower Brace. PCMforless Tune