I have a 50 ford i`m planing to convert to 12 volt neg. ground. I will be putting an alt. in place of the generater. do i have to use an after market volts guage or can i still use my stock amp guage? i know i need the converter for the guages i already have the ron francis one. second if the alt is internally regulated can i still use my points distributer?will i have to put in a differant kind of points?