I have been having issues with the Fast efi system. It was doing some strange things and I was making adjustments to try to compensate but now for the few last days it would dump fuel under acceleration causing a bog. So last nite I reset everthing and for the engine size I put in a 350 instead of the 355 I had in there before. I took it for a nice drive today and it seems like the system was confused by the last digit being a 5 instead of a 0 because it is running alot better and I have left all the default settings. I was getting ready to dump this Fast system and go with the Holley efi this winter.....