440 wont start when hot.

the 1st question should be........... is there spark when its hot and wont start.......eliminate electrical...
id say vapor lock also is the spark is there, sometimes, depending on the intake and if it utilizes the heat riser.... you need to also use a phenolic spacer under the carb to keep the fuel from boiling away in the carb... i believe thats for the carter/edelbrock barbs..