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Is my 1948 diamond t 6volt, positve ground?
Well, Larry, that depends on what year and model of Diamond T you have but most likely the answer would be yes. My 1948 306 has the original QXLD3 engine and am restoring it with the original 6 volt system. Works great!
My ’49 model 201 is 6v positive ground.
I forgot to mention that my 306 is 6v positive ground.