6 volt to 12 volt conversion question

I installed a one wire 12 volt GM alternator on my 6400 1953 Chevy holmes tow truck. It was 6 volt neg ground as all were from 47 on. All I changed was the coil and condencer, and light bulbs as they burned out. The beacon light never burned out . The heater fan worked better. the starter spun faster. Drove this truck this way for over 30 years. Never one problem. here is a picture from 2004.