I have this set of heads and intke all removed from the same early 1970 351C 4V and date matching. Yes they are Closed chamber heads. They are in good condition rebuildable. I do not have the original rockers or fulcrums, but all 16 valves are here as well as all the springs and retainers.
Heads Casting numbers D0AE- Date 9M16 and 9M16
Intake D0AE-9425-L Date 9M8
Asking $400.00 plus the ride. Local pickup is free…
I am willing to consider offers.