I suppose I should ask here too;

My buddy was just over here and has a problem with his work truck.

It's a 1991 350 TBI with an RV cam in it that is suppose to be "computer friendly." The foolish thing is constantly hunting. It runs down to 600 rpm and then darn near stalls, then it picks up rpm's to about 1000 and then after about 5 or 10 seconds starts all over again. This is a professionally rebuilt engine, cost him about 3 grand if I remember correctly. He's had it back to the shop that installed it a gazillion times and in his words "replaced every sensor on the thing." I told him about the help I've seen on the Stovebolt Page and he asked me to drop the information on and see what surfaces. Anyone have any creative thoughts on the matter? Thanks a lot in advance.