69 340 AVS fuel leak

I've rebuilt quite a few carbs yet still was bumfuzzled for a while in this one. If not for having the original needles to look back at, I might still be scratching my head.
Easiest thing to do would be remove the top and turn it upside down. Get the top of the floats to rest paralell to the underside of carb top and make sure the needles are completely closed at that position.