If you rewired it and replaced the battery cables, that could also be an issue. The 6V systems require a ton of amperage and I've experienced inability to start on a car with a brand new - yet undersized - cable. May be as simple as the block not getting properly grounded, or not enough amps flowing out of the battery.

-Boyo


'48 Willys CJ-2A / '55.1 Chevy 3600 / '66 Austin-Healey 3000 / '04 Volvo wagon (parenthood!?)