Header coatings, how necessary?

Cool thanks for the info Dave I'll keep that local guy in mind. I'm thinking of in the meantime pulling the headers I have, cleaning them to get off the teeny bit of surface rust, and then coating the outside either professionally or spray-can. I'm also gonna try to cut off the current header collectors and weld back in some bigger ones myself, I'm sure that alone would give me an extra 15-20 HP as the current ones are no bigger than 2" maybe even smaller...

Thinking more about it I could really stand to reduce my underhood temps as I now get minor fuel percolation idling in traffic even when it's not hot outside. I know a plastic carb spacer would fix that but I currently have less than 1/8" hood clearance, need a scoop and a hole in the hood before I can do it. I know I'm losing efficiency with the engine breathing hot underhood air as well.

EDIT: 67 prostreet gt I just noticed you're in Bellefonte, I grew up in State College btw and have some cousins currently going to Penn State