I just bought the HB coded motor/tranny that was on TC site.need correct answer please. What are the correct exhaust manifold #s for a 1969 SS 350 X 55, TH 350 with Factory A/C ? Thanks in advance. Yes I am a newbie to the site. yes ,I have owned my 1969 SS 350 X 55 since June of 1978. SIS (Self Inflicted Stupidity), I changed the color of the car,bought NOS GM RS sheet metal,Cowl Induction setup, Z/28 emblems,Angle Plug Heads. I am living proof that a little stupidity will go a long way.now I am on the path to a #s correct restoration of my 2 nd owner 1969 SS 350 X 55 highly optioned Camaro. Will be posting a lot in the next few years as I get this project underway. This is a huge source of knowledge along with the Team Camaro.site. So back to original question. What are the correct exhaust manifolds for this car ?