alternator for 65 dodge dart

Hi.

Recently the alternator on my car died (I had it tested to make sure), so I'm looking for a replacement. The problem is, I don't know what amp alternator to get. The only things in my car that I currently use (or that work) are the ignition, wipers, headlights, dash gauges & lights. I read online somewhere that if the wiring in my car hasn't been upgraded (which I highly doubt it has), I should only get a 35 amp alternator. Is this correct? I can't tell what the old alternator was because the numbers have are worn.

Any help would be greatly appreciated. Thanks.