i recommend you get an ATI Super Damper.
when the stock crank pulley wears out, it falls apart and destroys your belt, fan, fan shroud, and radiator.
it happened to me and i will never use an oem crank damper on a 2jz ever again.
the ati damper is about $340 and then you just need a slightly longer belt for it. do a search and youll find the belt size.
only needs service once every 8 years on engines up to 800hp.
besides that make sure you get a good used crank damper/pulley.