Hey Luke!
Actually, your 96 is one year into the OBD-II systems, so the gains will be more dependent on the how the ECU responds.
Seems about every even year (two year windows) the MFGRs make minor changes, every 4 for major changes. As always, give someone control and they're going to use it, and never to our advantage.
In many respects the ECU is our greatest hurdle. For the best in that area, you will need to talk to Dan Merrick. He knows more about those ECUs than I do and he is more than happy to share.
Talk to you soon!
Ron