There are several people throughout this forum who are using the Edelbrock Pro Flo 4 system. I know that is not what you asked about. sweetk30 had a Sniper kit and he had numerous problems with it. He documented a lot of them here,
http://67-72chevytrucks.com/vboard/s...ghlight=sniper There are some other threads in there that you might want to read as well.