I bought a 67 SS about a month ago and I have been having a ball ever since .... EXCEPT, I noticed the top of the battery wet ... Sure enought, the voltage reulator was working overtime ( 19+ volts ) I shopped around and found a $13 one from Advance Auto ... Napa and Carquest had ones costing around $45 . I also notice that the $13 one was very light in weight compared to the Delco unit the previous owner had in the car. My question is , What's the difference in technology and/or performance ? I am assuming that any new one would be solid state, right ??? I did have to drill a hole in the side mounting of the $13 one to accepts a capacitor and ground wire ... I added a volt meter to the car and I get a steady 14 volts ... I just want to understand what's up and insure that there's no need for concern here ... thanks in advance ... sdtsdt