'68 Barracuda - charging system questions

I have EI conversion btw. Yes, I charged battery with a charger up to at least 12.5 before starting up. Was only talking about running for a while to see if alternator charging rate would eventually drop from 13.8 to something lower. Not sure what you mean "don't know what you did..". As I said, I just added bypass wire (from alt BAT stud to the starter relay) - nothing else. What makes you say resistance has increased? Change in VR blue wire read? Do you happen to know what voltage regulator blue wire should read at idle and with increased rpm? When you mention test probing you are not saying if car is running or not or what the read-outs should be. Sorry, my typos do not help. Appreciate your time and insight on this. I think there is a bulkhead connector diagram that shows which terminals are which - will have to find it again.