On Monday, April 9, 2018 at 7:57:17 AM UTC-10, Kevin Bottorff wrote:
>
> I am betting you clogged up the radiator. If its old just replace it. thats
> what your symptoms tell me anyway. KB

A 66 Mustang is not capable of having a strange overheating problem. That would be like having a strange shoelace changing problem.