Ok, I hope some out there knows what Im talking about and can give me some help. I have a 91 Z-28, I swaped out the orignal 305 TPI, and now have been running a LT1, which is a donor from a 94 Buick Road Master. With that said, I would love to run Headers, but would also like to run all emissions, i.e, A.I.R, O2 sensors, and that funny tube that come off the exhuast manifolds and runs back into the intake on all LT1's, next to the EGR. So, my questions to any of you is there a know header that will work with all the emmisions and still fit in the Third Gen engine bay and now hit the body and run to a single Cat. I also would like a kit that come with Y-pipe. I know Edelbrock and Heddman both make hedders for both third and fourth gens but have no idea if they will work on my application.

Thanks guys!