Enzo-
Thank you for your patience and knowledge. You, of course were correct. My linkage on my 289 weber set-up was asymmetrical; it was due to a throttle return spring that I had installed. I attached the throttle linkage to the second(lower)hole in the driver side throttle lever and removed the spring. The car ran perfectly! During a test drive, the passenger side throttle lever nut vibrated loose and the car started running rough again. I tightened everything back up, but now I have the same old asynchronus problem. I've adjusted the passenger side lever every way that I can, but no matter what, the driver side bank appears to pass 25-30% more air than the passenger side. How can I adjust this out?
Thank you for your time and consideration,
tblackgt350
tblackgt350@mindspring.com