Welcome to the site
Before you do any swapping you should fix the leak and drive it. It was built to be a daily driver and work for a living, so don'r be afraid of putting it through it's paces. As long as you don't run it out of oil it will give you may thousands of miles of good service.
Contact your local radiator shop and see if your radiator can be fixed or re-cored...might be something easy!
Mike B
