Slant six over heated and now will not keep an idle.

It hold antifreeze, it starts the problem isn't it not starting it's that it turns off as soon as I start it and to keep it on I need to give it more gas. I just recently got another problem though the red ignition wire melted under the hood. I was told today that the carb might need to be cleaned so I'm going to do that first then I'll keep you guys posted or I might leave it that way because very soon I'll be swapping it out with a 318