Only cheap HEI works

Is napa any good for them, or is legit mopar the onyl way to go. Also, I think I've read about going to the later model voltage reg with the later style alternator, which I already have. Something about solid state and being more robust. Is that true, or just buy a 68 box and throw it in the car?
Oh dang I though you had the later alt and voltage regulator. I would upgrade to the later style always brighter lights etc.