I just did a MPIII swap and I had a 95 blower on my 95 SC duh It sounded good and eec learned as best it could. On the street it ran OK, really nothing to compare it to. I actually ran several 1/8 mile runs with it and it seems to run real well. dropped about 4/10 in the 1/8.
Here is where the problem came in, I ran it at the track in Dayton purposely to get it tuned from Dave D. It ran a 14.1, but was cutting off and sputtering half way down the track, (after the 1/8 mile distance), never had it WOT for that long before. Come to find out the computer was trying as best it could to adjust the A/F ratio, but could only do so much.
After the proper tune from Dave it ran a respectable 13.877 with very bad/shredding blower belt . The tune made a huge difference both for performance and safety.
Take some good advise and get it tuned as quickly as possible. These cars are too finicky to play around with and end up with a worse situation than when you started.
Good Luck,
Smitty