As for drilling the headlights, and installing clear lenses, I would never do that. Please, don't get me wrong, but I LOVE the promo features of those 1960s tooling kits, and that includes the metal exles, the simple frames, the one piece grille/headlight/bumper assembly, and even the fact it has no engine.
If I start changing this, the model will start looking like a modern kit, with lot's of tiny parts, and bits, and zero historic appeal to me, just like a restored car compared to a original survivor. As a car is only original once, a model kit is only a original if it's from the same era as it's subject, and iven tough I build new tooling kits, the old ones are really special to me.
Ok, now I see why you left them as is. Thanks for the explanation.