Inliners International Forums General Discussion Electrical Two questions regarding 6 to 12 volt and fly wheel

This one not electrical but next question is. I have a 1950 chevy sedan which my uncle restored. He has passed since I got car but told me the inline is a 300 cu inch. I believe he said it came out of a truck. I love the engines performance but the fly wheel has some bad teeth. My question is what fly wheel can I use to replace it. Next question is how do I change over from 6 volt to 12 volt? Or, should I hire it done. Thanks for the info.