Hi

I'd like to replace the bearings in the headset of my 1984 specialized bike and was wondering if I could just walk into any old shop and ask for "headset bearings"? Or are these different enough between different bikes and vintages that I'd have to go to some particular shop and state the specific part model or number of the headset? Or would "bearings for a 1984 road bike" be a good enough query?

Thanks