little horse,
Not sure what the problem is, but I am darn near positive it isn't too much fuel pressure. The carburetors are on a common fuel line, so pressure seen by the front would be seen by the back too.
Is the carburetor leaking where the air horn screws to the body? This would be the uppermost gasket..a leak prone area on these carbs.
The float, when adjusted properly, should set
the fuel level below this gasket.
I would remove the carburetor that is leaking, check the float level, needle and seat for junk, any threaded connection for tightness, and all gaskets for tears or damage.
It is my understanding that the design of the air horn on the Rochester B (?) allows it to become warped during casting, and this warping is why it is hard to seal along its thin mating line.
Stuart
