you should be able to use the flywheel off the 2jz and then just go to your local clutch shop and get a clutch kit for a w58... is your 1j already manual?
the only thing i think you need to watch out for is after bout 300hp i believe the gearboxes fail... but if i were you i would get the setup and find out for yourself really... at least then you know for sure how it will respond
