Ok, let's start over from the beginning and I'll try to explain this as simply and completely as possible. If you're not interested in what help I have to give to you, just ignore my reply and move on.
1) There are two different sets of coolant lines Ford used. One has the lines routed above the exhaust manifold, the other goes below. I believe (if I'm not mistaken) that the change occurred when the turbocharger became water cooled. In your pictures, your car has the below the manifold lines.
2) As you can see in all the pics posted, the water line from the drivers side of the engine to the heater core is positioned below the EGR tube. However in the pictures you posted of the installed heater line, you have it positioned above the EGR tube. See the pic below with new labels, illustrating what I'm talking about.
3) From looking at the Force 4 pipe pic you posted, you have the late, over the manifold pipe. See the pic below of the same pipe from my 86 Turbocoupe donor car, and note they're the same.
4) Regardless if the Forced 4 tubes are bent to be the early or late style, they should line up IF you position them correctly. There's the remote possibility that the Forced 4 pipes aren't a copy of the early or late pipes, however that's fairly unlikely.
So in my opinion, you have mismatched coolant lines, and you may be able to fix the problem by re-positioning the tube to it's proper location. You may not be asking about coolant line routing, but that's part of your problem. But hey, what do I know? I don't have Forced 4 lines, and my stock tubes fit my engine and car fine.
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