i have a 66 nova 2dr post with 32,000 miles on it and i am going to start using it for a daily driver. all original 6 with 3-sp. original plugs, wires ,points and so on.drives like a new car . my question is this, car starts and runs very good,fast idle works like its suppose to but after i turn car off on a nice warm day for an hour or less i goes back on fast idle again for maybe a 1/2 mile. how do i adjust this so it only does it in moring and not all the time even in hot summer?i really don't like driving this car every day because its to nice to tear up but it gets better gas milage then my truck. so now its just a car and i hope when it gets rained on it won't turn into a pinto or something.: