Don't let that secret out. People will start to respect you
For instance......the 93 SSE should be virtually identical to the 93 LeSabre, right? L27 and all. The gear ratio for the SSE however, is 3.06, while the LeSabre got the more common 2.84 ratio. So the 93 SSE chip (assuming no other differences in PCM'*) would plug in, but all the shift points would be screwy.
Now imagine the much-less common SSEi ratio of 2.97.
So we need to do alot of homework to see if he has options. He MIGHT be able to adapt an SSEi PCM.