[geezer#99]

Read that before. The subject comes up once in awhile over there. Some say manifold vac to the dizzy, some say ported, some say none but the majority say manifold vac to the dizzy.
You say the engineer said not to use manifold vac but I think you should read it again. He strongly recommends it. Calls 'ported vac' an atrocity.
If you're going to quote something and print it you better be accurate.
So enjoy your ill running motor hooked to ported vac with no initial timing and your new holley that's likely idling on the power circuit already. Everytime you fill up, just pour a gallon or 5 litres on the ground. It's the same thing.