OYE! The "high-port" manifold intake ports are 5/8" higher and 5/8" shorter on the bottom. They look like BB Chevy rectangular ports.
It will not match up with the bottom of a "Ford 4v" intake port as it is 5/8" too short.
You will see what I am talking about when you get it.
"Normally" in this situation (if there is such a thing), you need to make a plate to cover the bottom of the port on the head which has a 4v port.
2v CHI ports don't help the situation since the bottom of the ports are in the same spot as the bottom of the 4v's.
I had done this on one setup but was concerned that the plate would warp from the engine heat and develop vacuum leaks.
IF this match up issue happens and you don't trust your own volition, then you can go to Price Performance (he's on the web) and have him make a spacer plate for you. It's one of his favorite things to do with his cnc mill. He's not expensive on it either.
In any case, best of luck with this project. EFI 8 stacks run great on that manifold. The ONLY issue you are going to have is you won't want to get it dirty and won't keep staring at it. It's pretty!