Thanks for the replys guys. The car was delivered with a 4 barrel and appropriate manifold which went away when I changed to the webers set-up. So that left only the rear manifold vent/fill option. Use the puke tank fitting and there is no fill available . My desire to use the puke tank (
oil/air separator) is to be as original as possible, but what was the breather/fill set-up back in the day? At that time webers were not the "factory" race carburation , it was the single holley. I would think that the single aft vent would be adequate for the volumne of air produced by a healthy engine with normal amount of blow by.