I am trying to pick out a solo to "People Get Ready" in the style of Jeff Beck.

I have some basic tab and I can pick out the tune but I am confused about which scale I can use to improvise over the chords.

As far as I can tell it is played in D. Should I be playing a Dm Pentatonic scale or a D major pentatonic?

Or does Beck re-tune to some other tuning..

Here is the chord progression I am following.
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D Bm7 G A D
People get ready, there’s a train a’comin’

D Bm7 G G D
You don’t need no baggage, you just get on board,
etc ...................
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