My 81 has developed a leak around the top plastic. I actually think it's been there for some time, as the coolant level is always a couple inches low, even when I first bought it. It was not until I cleaned everything up, and added a new cap that I even noticed it, but if you fill it full, it will leak back down when your driving it. I've had it parked since finding it.

Should I buy a new radiator or just have the original recored?