Howsabout this: Maybe the smart approach is to get Tom's socketless brick fixer working, then we can start playing with selective writes. I have accumulated a decent stack of PCMs here (of both OBD1 and 2) so I could be a beta tester.

I think for tuning, I really like kur4o's hack of putting the MAF, VE and spark tables in RAM. At least with MAF and VE you could make the LT1 PCM self tuning, then if the selective write works, just flash those to EEPROM shortly after. Just dreaming here...