Carter 4732 flooding secondaries

Carter 4 bbls [ & Edel ] have one of the most reliable fuel inlet systems EVER used on carbs.
Did you do the test in post #6???

Get some warm water in a container & gently push the float under. This is checking for any leaks.
I have never found the float level or float drop to be critical with these carbs. Set the float level to 8/32" [ 1/4" ]; make sure the floats are straight, not rubbing on the side of the bowls & not binding on their pivots. Perform the test in post #6. If you still have flooding then you might have excessive fuel pressure.....or dirt in the fuel.