volt gauge or not?

well the black wire going out to the alternator through the bulk head was partially melted so I am glad I did it, so my other son will be doing his 80 Dodge truck next, as fro location of the volt gauge my so is putting a factory floor consul in his Duster so I may mount it there otherwise I think I am going to try to find a a pillar pod and mount one in there, his winter car is a 2002 Neon R/T and it has a " a" pillar pod wit a oil pressure gauge mounted in it so I may just try to locate the empty pod and put a volt gauge in instead, I think it would fit fine and look good, I will post a photo when I get it figured out