The MAP just needs a vacuum line fitted to the nipple on the bottom. The you can mount it off the manifold where ever you want. Remove the rubber seal and slip the correct size vacuum hose in it's place and find a vacuum source/port on the intake so the sensor can constantly measure vacuum.
You can do the same on the canister purge solenoid part of the evap system. That's the part that originally was on the Vortec intake. Only difference is the line out the side needs to be hooked to the line coming from the back of the truck. It's connected to the canister in the rear end area. The valve is simply a computer controlled open or closed valve. It opens when the truck is in cruising mode to suck up and burn the gasoline fumes. The tube up on the old intake was plastic with a short length of rubber at the end. You can cut the plastic near the firewall and run a longer rubber hose.
On the bottom of the valve is a nipple to hook vacuum to after removing the o-ring. It's not real long but you should be able to find a hose to slip on to it. Vacuum connections don't need clamps if they fit snug.
You'll need to try some different size hoses on both MAP and Purge valve. Or you could go high tech and measure them with calipers.