Hi, I had my 73 280 SE 4.5 for 6 month already and it drives just great. yet two things bother me.
1. whenever I had a warm engine start, car will shake for a while. But it goes well when car start to run. Cold start is just smooth. Is this normal for a 30 years engine?

2. Recently, I found some minor leaking at the upper edge of the radiators when water circulated. Can it be fixed or it need to replace the whole thing? Any idea how much for parts and labor ?

I appreciated if anyone can offer some experience. Thanks.

Paul