You might look into a headlight relay kit first. I put one on my truck and it made a huge difference. The headlight current doesn't go through the switch, so there's a lot less voltage drop, and all the other lights are brighter, as a result. Check it out-
https://67-72chevytrucks.com/vboard/...d.php?t=782071
As for brighter brake lights, unless you have flamethrowers, people are gonna be stupid behind you, anyway. People tailgate the H*** out of me, even when I'm speeding. I guess they like the fumes?