I'm wondering if this is normal? When my 67 is idling, around 800 rpm my volt meter jumps between around 15v and 16+v. The needle seems to move between those votages rather fast. Once I hit normal driving, bove 1000 rpm's it seems to remain consistant under 15v (my guess 14.9 or so). I dont want to burn anything up but it does concern me. Is this a problem with the alternator, Voltage Regulator, or both I am pretty sure that I have a alternator that puts out around 60 amps, and I have an electric fan, electric fuel pump and stereo with 3 amplifiers. with everything running my voltage never drops under 14v. I thought for sure I would need a higher amp alternator to run all my equipment. any help would be great.