I have replaced my 68 GTO engine, a/c and dash harnesses in past three years (Not all at once) and have found M&H to be spot on with all the wiring and color codes.
I recently replaced the original externally regulated Alt with a more modern and higher amp output internally regulated Alt. H&H makes a special harness that allows you to plug the wires to the external regulator so your dash lights will work properly.
The internal reg Alt is an improvement, but I am not completely interested in exact original for these kinds of item. I prefer function over originality.
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