Hey Guys ... I am looking to put the stock exhaust manifolds back on my 79 El Camino. I live in CA, and my smog guy told me the headers are a no-no. ( I got the car with mid length headers). My questions are ..Is the stock ones 2 or 3 bolt ? ( exhaust flange outlet). Also.. does anyone know if there are supposed to be A.I.R. tubes on them. Been trying to research which ones are right ,but both styles come up.