Hello. Got a 1986 chevy c30 dually 454 automatic. It is the air injection version carbureted before they came out with tbi. I want to do headers, valve covers, a polished intake manifold, a carb, and air cleaner. I do not want to replace my heads. Iv been told that the 86 egr stuff has different heads than the earlier engines. All the egr stuff is coming off. The truck is a daily driver that tows heavy loads frequently and uses 87 octane pump gas. I need someone to tell me what a good setup would be. Of course id love to have a tunnel ram setup, but i dont want it to be a strictly street truck because i do use it for work. Any ideas or previous builds that may point me in a good direction?