As is the usual case with this site you are receiving quality information. I'm Known as the Rochester B, BC & BV Nazi in my local area. Something that many miss on the rebuild is the power piston. once you take the air horn (top of carb., four screws), check the power piston, this is the tube that looks like a ball point brass refill. Very carefully pull it out, if is hard to move soak well wth Krol oil or Blaster etc. NEVER WD-40 (it will crystallize under heat). Twist very gently and pull base with needle nose pliers. You do not want to break it, it cannot be ordered. there is a small spring under it so don't loose it either. I always polish the chamber and stem with a small round gun brush. This has to move up and down, if it is not free it can cause all kinds of problems. Also be sure the the accelerator pump is not sticking and is clean, gently brush out the well and put the right number of balls in the well pending carb casting. Doc
