Well..

Any SCSI card will rock in a beige G3 MT, even a 2930cu.

Actually, anything faster than 40Mb/s UltraWide SCSI is overkill for those systems, but will work.

You'd want to upgrade the card only for reliabilty, not for speed.

According to my experience, i would gladly trash any 29160 or 2940 and replace it by a 2930, if not an ATTO card.