My next dumb question. Headlights

[67 GT350]

OK here is my next dumb question.
i see where 67 GT350/500 headlights are many different sizes depending where you shop. 5 1/5 or 5 3/4???
I am looking for a aftermarket set, NOT LED conversions, just some nice brighter lights, nothing stupid crazy. What are people using as far as a no mod headlight? Halogen is good....I do not car about judges.

[KR500]

Back in the day the industry standard bulb numbers were 4000 (Lo 3 prong) and 4001 (Hi 2 prong), today it is 5006 (Lo) and 5001 (Hi) # bulbs. They are roughly 5 3/4"dia.
Rodney