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Any advantages to this?
Like say a 94/95 EEC with ability to run an AODE trans?
Or go dumber and just a A9L or something from 89-93 stang?
I guy said it might help MPG since the truck computers were not set for performance.
Of course, a tuner might do the trick with NO swap for less...who knows.
The learning curve of EEC tech is still a road I have not traveled.
The reason why the mustang EECs are so popular for EFI swaps is because of the mustang community - the EEC's are very well documented and a lot of guys are doing crazy things with them. That means there's more information to use while tuning your vehicle, if based on the same EEC.
The truck EEC's are generally tuned for load - towing, hauling, etc, and of course trucks have different (slightly lessor) emission regulations to comply with for same-year cars so there are some differences there as well.
Which one you choose depends on your hardware - engine size and trans type. Obviously choosing an EEC that drives what you have "natively" makes the swap easier because the tuning part is just tweaking rather than a full-out edit, as would be the case if you're asking an EEC programmed for a 302 to run a 500cid stroker.
Newer EEC's also have flash memory which is where the programming changes are stored - rather than in an auxilary board that plugs into the older EEC's.