Welcome to the club. As Mike said any car battery will work as long as it fits the battery tray. I have had good luck with Optima batteries. Especially if the truck sets a lot. I have one in my 59 Firetruck for over ten years. Just keep a battery tender on it. Also it is a good idea to get a battery hold down assembly. Once when I was a kid I hit a ditch in my Dad's 57 pickup and the battery jumped out a tore the battery cables loose. He was not happy!
