I have a 1952 chevy 1/2 ton that I have been working on. The engine is just about ready to fire up, just need to rebuild the carb and change the fuel line. I eventually want to swap the original 216 engine for a 350. My question is, should I convert the current 216 to 12 volt now, or use the 6 volt system for now and wait until I change engines to do the conversion?