You might wish to check some of the old articles at xlr8yourmac.com on clock chipping the Beige G3, but if I remember correctly, the bus speed on the Beige G3 is controlled by a jumper in a bank of jumpers and the settings on the ZIF have nothing to do with it.   So, if you install the card in a Beige G3, you should get whatever bus speed you have set using the jumpers. 

The 1 GHz PPC750 (G3) supports a bus multiplier up to 20:1, so be careful what settings you choose.   With an 83MHz bus speed, you could, in theory, end up with a 1600+ MHz G3 speed.  Probably wouldn't damage anything, but won't do it any good either.  

I think that ZIF defaults to 10:1 when first booting though, so you should be okay.