'96 & '97 OBD2 LT1 pcms are STILL the bastard stepchildren of the tuning world.
There are very few OBD2 LT1 mail-order or ride-along tuners left.
For slightly more than the cost of an OBD2 LT1 mail-order tune, an OBD1 conversion has been the best bang for the buck for a while.

Now that steveo's $EEhack & FlashHack are on the scene, the bang for the buck hits even harder for even less buck.
Just make sure your wiring is all sorted.