Cable driven speedometer

[jhiggy94]

With the stock engine in our trucks is it a cable drive speedometer? And until how recently were cable driven speedometers used? The reason I am asking is because I found a cruise control unit that I want to install in my truck http://www.dakotadigital.com/index.c...prod/prd46.htm and for a couple years I am going to run the original engine in my truck and then I plan on doing an engine swap to a 12v diesel. But I want to buy a cruise unit that works with both engines. And I just want to know if this would work?
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