Hey, I have a 565 pump gas BBC in my 72 Ventura II with FAST f.i..I'm having a terrible time tuning my system. System was pricie. FAST does not seem to be much help. They told me to use the data log system on computer and I have. System bounces around and you can not tell what is causing the bounce. Car idles great and WOT is awesome but cruising around at 1500 3000 rpm sucks. the car surges. Map sensor is all over and so is everything else. The surging makes you think it's lean but changing fuel ration doesn't help. So don't feel like the Lone Ranger. Right now I have 400 turbo trannie problems. What can I expect it has 400 miles on it since I bought it. I't came from a pretty well know racing trans. builder. I also have a Gear-venders unit with an early olds 4:56 gear. Motor dynoed at 752 hp at 6200 rpm. Car is on www.pontiacventura.com 1972 page 6 3/4 ways down page. Boy could I tell you the problems I had putting it together. Thats another story