Creep, there's a guy over in MO that seems to rise to the top of all discussions about sorting out GM ECU's. Pretty sure that it's:
Brendan Patten
7227 Private Road 1830
West Plains MO 65775
brendan@lt1swap.com

If it's the right guy his web site is Programming Services If Mike52 (Mike in the Tampa area) sees this he knows for sure, because he did a lot of research on the LT package. You might PM Mike and confirm, or just give Brendan a shot via e-mail. Good luck!!