Regarding the location for the vacuum ports, I would consider putting them at the center of the plenums rather than into individual runners, The original port in the runner would have been for a brake booster. At the plenum center there will be less pulsation so should be better for the MAP sensor. My engine with OEM EFI had the port in the center and the port in the Aussie Speed manifold i'm using was in the rear runner, so I drilled a new port for my MAP sensor in the plenum of the Aussie Speed. Maybe do a little more research on this.T I need to drill and tap individual rear inlet runners for vacuum fittings as there is no common plenum. Each group of runners feeds the opposite side intakes and vacuum needs to be balanced. I don't want to drill an original intake however one side was already drilled for a vacuum fitting so I'll do the other.
Great looking intake!