That takes a Group 27 type, Josh.
Unless you want to spend the big concours bucks for a vintage replica battery, try to buy one with a plain black case that you can remove the stickers from. Then somebody in the club - sorry I forgot who - sells excellent "Mopar" labels that will give a reasonable facsimile of a vintage battery appearance at a pretty low cost.
You know you're going to accidentally tank it somehow anyway within a few years and you'll need to replace it again. It doesn't grind you as bad if you don't pay too much in the first place.
Keith Boonstra
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