Could be obvious, but I've got a question...
 

I have a 1964 GMC pickup, and I'm gonna probably get new, brighter headlights. But, I've been wondering, are all 4 bulbs the same, and it's just the amount of power going to them that makes the brights...brighter? Or are the bright bulbs different?

Re: Could be obvious, but I've got a question...
 

The outer ones do both regular and bright (3pins), the inners are bright only (2 pins).

Re: Could be obvious, but I've got a question...
 

make sure if you upgrade to brighter lights , you also upgrade to relays ,you will make them even brighter..

Re: Could be obvious, but I've got a question...
 

Here’s one thread on headlight upgrades, there are several available. For a two headlamp truck just ignore the two inboard headlamps. Everything else is the same:

http://67-72chevytrucks.com/vboard/s...dlight+upgrade