Also check out http://www.chouby.com/apps/autogas.html

For vapor lock prevention, the best thing to do is to open your cowling
right after shutdown to let the heat out, if you're going to take off
soon. It's a good thing to do anyway to extend the life of the hoses
under the cowling.

I found myself flying more frequently since I started using the autogas
STC. That's another benefit to the engine.