Faulty battery, bad alternator, or both (photos)

Sunpro is what I use, but they are not that accurate. They are great for daily driving. There's only one or two Sunpro inexpensive gauges

Here, read this thread. I didn't come up with it...........It covers several different cluster types

http://www.forabodiesonly.com/mopar/showthread.php?t=119480&highlight=ammeter+conversion