The distributor will run off of "throttle plate" or "ported" vacuum. As does the EGR. Pretty much everything else will use manifold vacuum. There should be a decal under the hood which tells what goes to what on the original carb..
The EGR will go through a ported vacuum switch, which sends vacuum to the EGR valve only after the coolant temp gets to a particular low-temp threshold level.
I would think that FiTech tech literature would indicate which vacuum ports on their unit yield ported or manifold vacuum. Power Brake vacuum usually comes from a fitting which screws into a manifold runner itself, although some have a separate port on the back of the carb/FI unit just for that. HVAC vacuum and maybe cruise control vacuum can come from a vacuum tree that can also have the power brake vacuum nipple on it. Sometimes, the cruise control vacuum comes from the power brake booster check valve fitting.
PCV will be hooked to manifold vacuum, as will the carbon canister main vacuum source. It's not as onerous at it might sound if you understand how it all works and what makes it work.
IF you really want to see a vacuum hose "bad movie", look under the hood of a '85 Olds with their 307 V-8. Or a later '60s Ford V-8.
CBODY67