Go to rock auto.com. They have all the parts list and diagrams of the head etc. That’s usually how I do it if I don’t know.
I don't think there's much of a chance of these getting paper thin, they're not flimsy lights (I speak from experience, I dropped one and it bounced all over the place on a hard floor lol), it's not all that much sanding, and most of it is with high grit.If ya want perfect lenses without sanding them paper thin you can always sand the oxidation and rough pitting out and clear coat over it a couple time with a high quality clear and buff them. Supposed to be a more permanent fix to the UV damage and oxidation. Haven't tried it myself but plan to when I retrofit the headlights on my third gen.
True cold air intakes are at the very least shrouded and gasketed off with an air supply coming from the front somewhere. At best they're a stock style box almost with a chamber sized right with a quality filter and good runner to the throttle body. Hot airs are pretty much everything else, your pod filter on the end of a pipe for example. Nothing wrong with them in theory just toastier IAT'S but they're alot more convenient.
My advice on your lift would be do it right the first time and buy both now if that's the route you wanna go. At the end of the day when you lift the rear you're gonna have to spend the other half of that $40 if not a little extra so buy the whole kit. I'd try and go for a leveled lift myself🙂