Avi, I assume that you are referring to the bold-face, large type "Caution" note listed at the top of the "Power Steering Pump Pulley" section of the 1997 Viper Service Manual which says:
"CAUTION: The pulley used on the power steering pump has been changed from a metal pulley to a plastic pulley. The offset of the two pulleys is different. Do not use a metal replacement pulley on a vehicle originally equipped with a plastic pulley. This will damage the serpentine drive belt."
I would suggest that this note is to specifically to warn against using the Gen I pulley (metal) which is indeed different. Since this was written well before any sizable numbers of Gen II Vipers were on the road, the relatively high failure rate for the plastic pulley was likely unknown or thought to be minimal in terms of numbers. Also, at the time of the publication referenced, there were only a few "dress up" pulleys offered by my memory. Since that time, with more and more reported failures on stock Vipers (let alone forced induction beasts), professional machinists began to offer a CORRECT aluminum billet pulley...and a billet bracket since these brackets were now being discovered to have a significant failure rate as well on both Gen I Vipers and Gen II Vipers.
The Gen I and II kits DO differ.
Search "power steering pulley" for dozens of threads reporting failures of either/both components. If you are still hesitant to change yours, so be it. If that is the case, you might start carrying a spare belt, tools, and start practicing the repair in the dark just to be safe.
Here is a thread where some of us did a "field repair"...in a mall, with both a Sears and an AutoZone CLOSE by !!!