[Ironangel]

Make sure all your ground straps are in place with clean tight connections. Spinning up 18 volts seems unusually high? That got me to wondering what the pulley diameters were between alternators, sometimes that makes a difference. I have a chrome 100amp one wire alt. on my BB truck, no problems in 3 years. I have an internally regulated alt. with the blue and white wires in place on the SB daily driver, no problems there either. I did make my own ground straps and added an extra strap from the block to frame and frame to inner fender insuring that rinky dink factory strap at the back of the motor wasn't getting over worked with a degraded connection from the valve cover to the firewall. One of the reasons I drive a 72 Chevy is there are no computers to present problems my 60 year old mind cant cypher. Tim, that rotten egg smell happens to me once in awhile, usually sumpthin I ate. Good luck