To the board
Thats a good lookin' Truck you got your self.
The simplified version is to remove the guage cluster and find the wire thats for the lights and follow it back to where ever it terminates i would bet someone hooked it into the fuse block to a SW. IGN. port. unhook it and rewire it to the light sw. you may need to buy yourself a manual with some wiring prints in it to find out what post to connect it to.
As for the volt meter you can just run a fused wire right to the Alt. and the other one to ground. thats it.
Good luck