Thinking out loud about Blazers and factory tachs

[Critter]

It's the weekend so I thought I would start a little discussion thread just for the heck of it...

Is it just me or is a tach MORE rare to find in a Blazer than a truck? I'm talking factory optioned of course. It seems that way to me. In my mind a tach in those days was something that a car/truck with standard transmission, or a PTO, or a "sport package" would get. The majority of 69-72 Blazers are 4x4 automatic passenger vehicles which doesn't fall into any of the above categories. Is that the reason for not many of them getting a tach? Or am I seeing it wrong?

Anyway, thats been floating around in my head for a while. Please feel free to throw in your 2 cents.