Next issue was the Borg/Warner needle & seats that had been previously installed. These units are responsible for more junked float bowls than I can count.
The problem lies with the extra threads below the groove for the O-ring--if this type of needle & seat is threaded too deeply into the float bowl, it will cut threads into the boss where a normal Holley needle & seat seals with its O-ring, thereby ruining the bowl.
