I just posted this in the 73-91 forum, but just incase you don't frequent there. If you can't get the PROM from him i just found out from Brian at TBICHIPS.com saying that for $24. he can send me a stock 350 manual trans PROM or he can make a Stage 1 "performance chip" also for $50. Just an alternate route in case you can't get it with the tranny.
Nate /forums/images/graemlins/k5.gif