That'll be hard to do without some donor suntour cassettes. Shimano used all 3.0mm spacing for 8 speed, and a mix of 3.1 and 3.3mm for 7 speed. Suntour ran a mix of 3.1 and 2.8mm for 7 speed, and I can't remember right now for 8 but I think it was all 2.9mm. I just run all my suntour thumbies in the light-action friction mode anyways. You run them on all your bikes and its not hard to remember how far to shift to find the next gear.
I am running 8 speed XC Pro thumbies (in 8 speed indexed mode) on my Paramount. I regularly swap between a road and off road wheelset. One has an 8 speed XTR cassette and the other has an 8 speed SACHS freewheel. Both work pretty well, depending on how many miles are on the chain at any given time. Occasionally will require a slight overshift to hit a gear.
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