I'm new to the forum. I purchased a 1-owner 1976 last October. Fellow forum member and best bud "cygnusx1" found the ad for me. In any event, I was diagnosing EFI issues and made a chart to easily track and record ECU harness checks. The chart is for a 1976. The chart indicates the wiring diagram and test description for each test. The original spreadsheet is attached. Please note that there are two work sheets on the bottom tabs. For those without an office suite, I attached both worksheets.