The car runs fine, just when it sits for about 15 minutes when the engine is hot, then it cranks for a long time before it will start due to what I believe is vapor lock. What can I do to stop this? It's really embarrassing to start it in public. It's a '68 with a 302, edelbrock intake, and 1406 4bbl carb. It has a spacer between the manifold and the carb. Any ideas on how to stop the vapor lock?