My reference book lists it for the full size 1968 400CI, 340 HP, OR the 350 HP engine.
The M7 is the date. If a Carter made Q-jet, the M=December and the 7 would indicate 1967. I believe the VC is the plant code, ie the Pontiac factory code used for ID just like the engine ID and was found on the factory build sheet during assembly.
So, it's not correct for this engine but should work anyway. Right?