I have two YFs on the 39....put em on they worked for years til I got really sick and didn't use the truck for months....now boilin'
I have two Monos on the 37 Packard....Made them outta a dozen or so cores....Then had to mess with them as per 'inliners directions' Had them off and on many times....they now work pretty well on a Very Custom motor
So YFs WIN!!!
But if you have nothing else to do but get madd at your carbs and keep tuning ..... Mono!
