Is it possible to swap in a 96-97 628 ECU into a 94 850 turbo? I know the 94 has an EGR system and the 96-97 dont so I can remove the EGR without a code right? Are there any "systems" that the 96-97 have that the 94 does not that will cause and CEL's. Also will I still be able to use the diagnostic port with a 96-97 ECU since those cars are specifically OBDII? Any and all help is appreciated. Just tossing around some cheap ideas for some extra performance.