i just bought a 87 iroc-z with a 305 carb engine. the guy before me managed to rig everything in the car. i fixed most of it but i cant figure out what to do now. off of the stock exaust manifold there are lines connecting to one large tube. it seems to me like an egr tube but i have no idea where to hook it up to. im planning on buying headers for the car so would the headers come without the lines?

also, what kind of headers do you recomend buying. im looking for something betweed 3-500 with a y pipe included