After rebuilding my (12 volt) flathead, I am thinking of replacing the 6 volt starter with a 12 volt, instead of banging it with 12 volts on startup. I see that Speedway has 3 options. a 200 lb-ft "stump puller", a Powermaster "XS" starter and a Powermaster original look 160 lb-ft starter. Anyone care to share opinions.