[Excaliber]

My dual four barrel Ford 427 Hi Riser intake is split into TWO separate front and back "chambers". The rear carb feeds ONLY the back four cylinders and the front does, well,,, the front four.

Therefore I cannot "lean" or "richen" one carb over the other, they HAVE to work together.

Not sure what kind of manifold you got Olaf, but check that before you get the two carbs out of synch in any way.