Re: QUADRAJET MANIFOLD (preferrably aluminum):
what exactly are you trying to do? what kind of car are we talking about here?
most manifolds out there either have enough holes to do what you want, or you can easily drill and tap a hole into the coolant crossover to mount the vacuum switch.
or there is the other option for if emissions testing isn't a concern- just forget about the emissions stuff and hook up the bare essentials -heater hoses to the coolant jacket and vacuum advance, power brakes, pcv, and trans modulator lines to the runners for vacuum.
you don't plan sincerity.
you have to make it up on the spot.
wanna hear about 20 years ago when i was too smart to know any better?