I have a 65 Mustang 289 and that has had a lot overheating issues to the point after replacing everything I could to cause the issue so my last resort was to get the heads rebuilt due to low compression issues . I also had the intake replaced along with a new head gasket. The overheating issue is a lot better but still running a lot warmer than I'd like to see but the big issue it has started to smoke which it has never done in the 8 years I've had the car. I'm taking it back to the shop that rebuilt the heads for me to see if they can track the issues but do you'll have any feedback on what might be going on here? Thanks.