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I just bought the $69.99 Autozone timing light, wich is advance capable. It is a step up from my 1970's static light, which plugged into the wall.
The problem is the new one runs off the battery and obviously they weren't thinking about C3 corvettes with the battery behind the drivers seat becaue the wires aren't even close to long enough. Not a huge problem, because I just spliced the wire and reconnected the battery clips, but if you are going to buy one be aware...
I guess it's good to have a father who has been a mechanic longer than most of us have been alive....I just watched him, or I would be asking the same thing