Let me respond this way. I have not done the kinds of dynamic testing from which you are looking to see data. Ford did that when they designed the systems. The purpose of the systems is to make the Federally mandated (and that would be the demands of "we the people" if you stop and think...
Replace the ECT (Engine Coolant Temperature) sensor (three-wire sensor typically mounted near the water neck). The symptoms you describe are textbook for an ECT sensor failing with a "stuck cold" condition. The ECT sensor "tells" the ECM (computer) what temperature the engine is at. The...
The MAF-equipped trucks have a different top cover to the air box with a single plenum and mounting flange for the MAF sensor. The intake tubing is basically a big rubber "Y" tube that runs between the airbox with the MAF sensor mounted on it (single bore) and the throttle body (twin bores)...
I have more "process photos" from the construction of that top than I care to think about. I can cull some together and maybe post a thread in the Bronco forum for you and anyone else who might want to make something similar.
You shouldn't have to unless you discover that there are no cracks. Then (and this would be an extremely rare occurrence) you might need to replace the seal between the top and the aft section of the steel roof. In that event, you would need to remove the top. I have seen some of these seals...
Either cracked sealer in the rain gutters themselves or the dreaded "aft gutter cracks"! Typical problem for all Broncos between 1980-96. They start at or just aft of the end of the gutters. The best approach is to clean the cracks (wherever they are) as best as possible and fill them with a...