I know you were saying you dont want it to be a hotrod but in this link there could be some valuable info. When I first read about the White Zombie I would think instead of trying to run all that voltage, try increasing the capacity. I would go with the Sentra

I went through his site and the "Blur Meanie" looks to be more of what you are trying to do

http://www.plasmaboyracing.com/bluemeanie.php