My step van has a 261 and was sounding great. I drove it around town and noticed it was starting to idle a little rough at stop lights after it got really warmed up. Could anyone suggest things to check that would make the engine idle rough when warm. I've decided to get a heat insulator for the updraft carb just in case it's getting a little too hot down there. I'm going to check timing again tomorrow. I also noticed it wasn't starting right back up as easy after shutting it down after being warm. Other than that, I'm not sure. Thank you.
