Carter 4732 flooding secondaries

It might just be some debris under the n/seat.
Try this: remove rubber hose from metal line. Put a 3/8" bolt [ or drill bit ] in the hose to block it off. Run engine until it stalls [ carb is now empty ].

Re-attach hose. N/seats are now wide open. Start engine. Hopefully in-rush of fuel will dislodge debris.