Went out into the cold garage and refreshed my memory on the vacuum hose setup:
On my '78 Monojet and integrated head, the HEI vacuum advance hose and THERMAC air cleaner both share a tee off the port on the lower throttle body in the picture. The thicker hose from the float bowl to the EVAP valve is above that. And then the vacuum hose on the upper right goes around to the water neck thermal valve, then goes to a tee where it connects to the EGR and to the purge valve.
That's a little different than the diagram above recommends. From the stock setup, it would seem like the "Full Manifold Vacuum" port should be for the THERMAC and HEI advance, and the labeled "Timed Spark" should feed the Evap canister. And the PCV port would be for the tee for the purge valve and PCV.
But now I see the bowl vents labeled on the Holley diagram. So I guess there is no Evap connection for a Holley, that part of the Evap system can just be deleted. Just the canister and an external purge valve are needed to contain the fuel tank fumes.
