[s-cars] ECS swap question

[jimk at spotgraphicsinc.com]

Hello,
If I were to take the ECU from my 93 S4 with a Lehman Stage 3 chipset
that is meant to run with stock FI's, MAF,Cam  etc. but RS2 manifold and
turbo, and put it temporarily into a 95.5 S6 with a completely stock
powertrain, will it work properly or will it cause problems?  And will a
stock ECU work with an RS2 turbo and EM (the reverse swap)?  Obviously
it's not as good in either case, but will it actually cause problems?
Thanks,
Jim