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Discussion Starter #1 (Edited)
OK, the donor was an 88 Lincoln MK VII with a DX3 ECU, which seems to be different pinout than the Mustangs.

I want to convert to MAF, but it seems it isn't like the Mustang conversion, needing some other pins changed.

Does ANYONE have a pinout for the DX3? Has anyone done this conversion on a MK VII??

I also need to know how important the VSS signal is, as I do not have a VSS on my vehicle (78 CJ5 Jeep). It uses a speedo cable from a 56 (Shoebox) Chevy Sedan. Is there anything I can use to add a VSS?
 

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A bunch of us have Mass Air swapped our Mark VII.
Just like the Mustang, the swap requires a Mass Air ECM from a Fox Mustang or other Mass Air Fords from that era. The Speed Density ECM cannot be repinned to Mass Air. Also, what donated the harness for your engine swap? Basically, It's not the ECM you are repinning, but the connector at the ECM.
IF you are not going to drop an aftermarket camshaft into that engine, stick with the SD.
At the moment I don't know how important the VSS is. But I bet someone else here soon will chime in.
 

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The speed sensor VSS didn't become important until the later 90's PCM, basically OBDII computers started using it. Before then it was just for the speedometer, later it's also needed for ABS. The early VSS at transmission sensors were integrated with a cable, so in Fords there are those that do both, feed a cable and the VSS, like the Mark VII's use it for the speedometer.
 

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Discussion Starter #4
Ok, I want to thank you all for the help. 2 days ago, I plumbed in the MAF sensor, ran errands all day yesterday in it. Today, I actually wired it in. Simple! I used a MAF sensor wiring from a donor harness, so all I had to do was remove/relocate the required pins, splice power/ground to the correct pins, and connect the ECU. It fired first try, idled great. Got it all put together, and my lower RPM lack of power is gone it seems to have more response when on the test drive. Halfway home, I remembered to disconnect and plug the vacuum line, and it ran even better the rest of the trip!
 
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