I installed a engine out of a 97 ss into my 94 and never tuned it at all.
As far as i know the 97 had a slightly different cam. My car puts out really good #'s on the dyno for my mods, but is always pig rich.

Just curious if the car is running at its potential considering the cam difference albeit it a small one.
Or if my computert compensates just fine.

 

im just guessing here so dont hate me if im wrong, but isnt 97 OBD2 and 94 OBD1? the car might also need to be tuned to the motor , just some thoughts on my part