All the M37s were 24 volt. If you see any 12 volters, they've been converted. The Canadian didn't get the 230 flathead though. It got the 251. Some US and Canadian M37s also got the rare optional 4.98 gearsets front and rear. Most of them though (like mine) got the 5.83 gearsets. Yeah. 5.83. Course.....you said he wanted a WWII era vehicle, which the M37 is not. they were made from '51-'68.