Ok, I've read some of the other hot start issues that some have had and they seem different than what I have going on. I hope someone can help. I have a 1971 Scout II with 49000 confirmed miles, 345/727, Holley 2 barrel w/ no spacer that I know of, stock engine other than pertronix. I run 93 octane with leaded additive. Cold start is immediate with no smoke at all, I mean not even a complete rotation and its running fine and idles fine. No hesitation anywhere, no spark knock, idles perfect and runs great. New tune up all around and new carb rebuild. If I drive somewhere, say the grocery store, and its off for 20 minutes or so, the truck doesnt want to start at all. It turns over easily, but doesnt fire. I have tried pumping the gas three times before cranking, I have tried pushing the gas to the floor while cranking and have tried no gas at all. Doesn't seem to make a difference, and when it finally starts, it smokes badly and sputters until revved and then runs fine. I have read about fuel boil, fuel evaporation, fuel seepage back into the tank, carb spacers, oil passages clogged, etc. Most all of these make no sense to me at all since cold start is perfect. All of these issues would effect cold start I would assume except maybe fuel boil. Any ideas?? Or am I missing something.