you asked for a B2b for a reason ..probably because xfi at around $2K was probably out of your budget or mind set
nothing wrong with b2b ..it works ..its just old and as such its usually avalable really cheap , cheap enough that selling off your old ecu , scanmaster powerlogger will cover most of the cost and leave you with a nice tunable enginemanagement system with reliable logging and built in wideband that actually works , it was 2600 system when it was new
what updates would you need ? hook it up drive it , or sell it and spring the bucks for the xfi