I would suggest you reach out to a company called "Speartech", they will re-work the factory wire harness for a stand alone operation in your 67. They will also re-flash the factory computer for a stand alone, removing all the unnecessary data. This is all scienced out. They are excellent to work with and have been very helpful with any and all questions I had/have. All wires are clearly labeled when you get the computer and harness back.
Tim john---
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