OK - in post #8, picture of manifold, red circle - there is a fitting that goes in there that a vacuum line hooks to for emissions crap. If you've pulled all the emissions junk off your engine, then leave it plugged.
Without emissions crap you will hook your dizzy directly to the vacuum port that is located on the passenger side of the carb just below and slightly forward of the choke linkage.
Vacuum lines that are connected to the vacuum antler at the back of the engine are the brake booster, automatic transmission vacuum line (goes to the vacuum module on the back of the tranny), heater/air conditioning control (if you have A/C), cruise control and then connection(s) for emissions crap.
3G Alt. Upgrade, Duel Batteries, 351M bored .030 over with Edlebrock cam and intake, C-6 w/AO4D internals, 3" lift w/RS 9000, 33x12.50 MTR's, Saginaw PS Pump Conversion, On Board Air, Detroit Locker, Hydro Boost Brake System, Altimeter from a CH-46D, Map Light from a MH-53E.
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