Hard start when hot

74 Dart -225 - single barrel 1945 Holley - fresh rebuild - electric choke kit

Cold start - great

When it's hot - turn it off - starts when you bump the key

Leave it for 5 minutes - have to crank forever with the pedal on the floor

Choke not engaged when it does this

Thoughts? Where to start checking?

Yes, I have a spacer under the carb. Could it boil dry that quickly?