First let me say that even tho I have not posted in a long time, I have been around reading and lurking. So here is the story, I have an old '85 K5 rust bucket with a '72 350 w/ edelbrock performer intake and a quad jet carb, headers and pipes with (don't remember the brand) mufflers and no cats. Sounds and runs great! I recently purchased an '89 K5, put the lift, shafts, tires and what not from the '85 to the '89. No problems there. Then one day about a month ago, I decided to take the headers and pipes off the old truck and put them on the '89. Now this went with out a problem and they still sound good and gave me a little more power. But now here lies the problem. I have so many damn fumes now emitting from the engine that I don't think saddam hussein could survive driving it. Its starting to run crappy also. It smells like the gas/air mixture, and I'm sure it has something to do with JUST putting the headers on without adjusting the TBI or anything like that. So the question is, what do I do with it now? I tossed the old manifold and pipes so I can't put those back on, and I know nothing about TBI or the emissions or this year motor. I am not ready to do a motor swap either.