In most cases the advertisement is correct. From what I understand, one of the early people who supported that ad is no longer with FAST - could be why. Much of the ECU TBI problems with differing cam and engine manifold combinations weren't known early on. The open spacer is needed to reduce the venturi effect of the intake design for a carburetor. A four hole spacer will make no needed change. The open spacer is just something that may work with your dual plane. I believe this is the intake you need - if you don't have the high rise 427 heads. A single plane that is no longer manufactured - http://www.ebay.com/itm/331633356776. this one has been modified for the medium rise heads, but can be converted back to the low rise heads. Otherwise, you need a custom fabricated intake. Your factory original Ford dual plane is worth a small fortune. Don't modify it. The connector you found on the FAST site is similar, but the one I mentioned converts to the commonly found GM old style 1 bar sensor. These come straight from the factory, so I would order direct from FAST to assure getting the correct part/s in the shortest time. Once you get the new "Old Style" sensor connected and mounted somewhere. You just plug the one that came on the throttle body back in to the throttle body. It will just be a "dummy" there since it won't be electrically connected. All it will do is seal the throttle body port it sits in. There should be enough left of its seal to reseal the "dummy". The EZ EFI 1 requires an idle vacuum of 10" for good operation. You should also be running an automatic transmission - as the adaptive learning works better with an automatic. The XFI Sportsman ECU would have been a better choice as the adaptive learning can be shut down in favor of manual settings. It can also handle lower vacuum at idle.