I finally have things looking good as far as blms and the ae settings go. Ive been working on the spark tables a little the past few days and this thing doesnt like much more than mid 20s spark setttings. I thought BB chevys like a lot of spark.Im not sure of the actual compression ratio but i estimate its about 9.5:1. I tried a '90 TBI BB knock sensor thinking it was false knock but i get a code 43 as soon as the engine starts. Anyone know the resistance value of this ks. I guess ill have to use a resistor to get the ecm to pass the knock test. Also, if someone has a base SA table from a holley or acell ecm i could look at to get some idea what a BB table looks like, would be a big help.