W8ye,
I AM WELL AWARE OF THE .90TS. IT IS JUST THE BIGGER BROTHER TO THE .60 TWIN. I WAS JUST STATING WHAT IT TOOK TO MAKE A REAL RELIABLE 1.00 TWIN (SINGLE THROW CRANK WITH TWO CARBS). I DID NOT NEED TWO TANKS OR TWO CLUNKS. THE CLINE MADE ALL THE DIFFERENCE IN THE WORLD SINCE THE CARBS ARE MOUNTED SO HIGH THAT YOU WOULD NEVER GET DECENT FUEL DRAW IN MOST APPLICATIONS.