the large vacuum hose is hooked to pcv at the back of the motor. it tees of to my vacuum wipers, i plugged that thinking it might leak there, no difference. i still feel like there is an issue with the center carb, i'm gonna send out and have it checked again. then hopefully it'll run enough to check for vacuum leaks. i'll keep dickster in mind, if this doesn't work. thanks everybody for the support.