Hi - I have a '51 GMC 1/2 ton truck that I'm planning to add a '55 or later engine to...Will that make a conversion to a 12 volt system necessary, or can I make the new engine & charging system compatible with the original 6 volt setup?

Thanks - Dickson

1950 Chevy 3100 short bed
1951 GMC 3/4 ton long bed