Karl, There have been several aftermarket cruse controls available over the years. I had one installed on a van that I had. The thing worked well to. Now it harder to find a vehicle without cruse than with. I have a tilt setup in a box, along with the cruse control and there is a cable that looks like a speedo cable. So I would say that yep tis a cruse alright.
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John

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In the cool still quiet of night, you can hear chevies rusting away.