My understanding is that the newest fluidampr is redesigned, it has an offset face and uses a stock pulley. $400 or so.
Chrysler Engine Harmonic Balancers • The Original Fluidampr
It's like everything else, pros/cons. You can buy the cheap one, buy a billet pulley (if you planned to anyways, the cost is essentially the same) and maybe have some mfg issues. But, you'll save $100-200.
Also, a few different MFGs all repackage the same Chinese made balancer, PRW included. I know the speedmaster one is the same for sure. So if that's the path you're going down, do some shopping around and buy the cheapest one.
