I know that Jack (c'mon now). I'm talking 95+ pickup dash. They are of course possible to fit in the trucks, just takes a bit more work but still do-able. The medium truck dashes are slightly different than the 88-94 dash as evident, but mostly in the IP cluster area. They are still mounted in the same locations near the windshield and kick panels. Obviously this one has a control box for the Allison where part of the center dash section goes.
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Here is a close-up
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Obviously not a direct swap... it would end up being along the lines of the work involved in swapping a pickup 88-94 to a pickup 95-01 dash. Easily do-able. I've seen a few medium trucks with it done.