If you are using your original speedometer and instrument cluster, you will need the same snap-in sockets that were originally used in your truck. If you have changed to a different wiring harness, the bulb sockets with it should be the same. If they are not, then you'll need to cut/splice/solder and insulate to change them. All of the 6v bulbs have 12v equivalents. The clear 12v bulbs will be sold as bulb #1895 and are available lots of places. Hope this helps. I don't know what turn signal type you have but you can take each of those to your local auto parts store and find the 12v equivalent.
