[Kurt in NJ]

I use a cast iron fuel bowl--- have never seen a bubble in it
When the metal fuel pipe was cut to length with a cutter the burr left constricts the end--- similar to the crimped over end of the hamsters water bottle--- ream the ends to the diameter of the pipe
Get rid of paper filters, use original screen
Make sure there's no low spots in the fuel pipe-- all downhill to the carburetor---- it's working for me