Starting problems

[ashman40]

There are a few reasons why it can be harder to start a warm/hot engine....

Heat soak - While the engine is running, the cool air from the fan cools the engine/cylinders/head. As soon as the engine stops the cooling stops and the heat from the cylinder spreads to the heads/intake/carb. The head temps will be even HIGHER than when it is running.

Intake flooding - Fuel flowing out of the carb after the engine has stopped collects in the intake and possibly into the cylinders. Ideally, fuel should NOT flow after the engine is stopped. But the following could cause fuel to flow:
-- Heat causing the fuel to "percolate" and bubble out of the carb and drip into the intake
-- Excess fuel pressure in the line from the fuel pump causes fuel bowl to overflow into the intake (check inlet valve)
-- Fuel line "percolating" because it is in contact (or near) with something hot (eg. head, exhaust or case)
-- Crack in the fuel bowl leaks fuel into the intake until the bowl is empty (or at least below the level of the crack)

Parked nose up on an incline. With the fuel tank fuel level higher than the carb (easier in the SB), fuel will siphon out of the tank into the carb and flood the intake/cylinders over time

Next time you park your HOT car from a drive, remove the air cleaner and confirm if fuel is dripping into the intake. Often you can actually SEE fuel dripping. Replace the air cleaner to prevent the fuel from evaporating.
After you've left the engine to drip and flood the engine (~30min), remove the top of the carb and check if the fuel level in the bowl is at the normal level (3/4" from the top of the bowl). If the bowl is filled to the top it means fuel is being forced into the bowl and it is overflowing. If the bowl is low/empty it probably means a crack in the bowl.