From the wiring table, the only difference I see from the 004 to 009 is the fuel pump wire and the 8V reference wire for the higher signal AFMs. The air temp wire exists on both units. I don't see an advantage if your AFM is a 5V one, which the Motronic ones are. Motronic ECU has it's own fuel pump wiring too. Can you explain why you think the 009 is better than the 004?
I'm still planning on getting one soon. I am running an open loop system so I think I should get an O2 sensor welded in before I get one, so I can adjust. I haven't done that yet. I'm going to get some exhaust work done soon anyway since my cat seems to be disintegrating as a result of running open loop for about a year now. At first power seemed down, now power is good but there is a rattling from inside the cat. I'll run the O2 sensor to a guage I have so I'll have them make the new cat removable and make up a straight pipe for now.
So after all that work is done, I'll get the conversion unit. I have acquired a Ford MAF from the correct engine model, so I'm set there. I'll post results, of course.
iachella [at] gmail [dot] com