Ok, I'll jump in on this discussion! Just a couple of months ago I attended an auction at an old Chevy dealership and purchased TWO N.O.S. Rochester 1bbl carbs still in the boxes, never opened. I had hoped to use them on a 2x1 set up on my '51. Are you guys that ran Rochesters saying I shouldn't bother or that you had problems with rebuilt carbs?? I well know that they are prone to leakage but, I thought that maybe new carbs with no wear might not be as problematic. Tony, what do you think????