lots of work needed. You need to change the whole drive train, the 2JZ is RWD, brakes, you may have to cut the firewall, dont think the inline-6 will fit directly in. Plus you need motor mounts, ECU, wining harness. It would be quite costly. In the end it would be worth it, youll have one really rare car, and quick as hell. Well good luck on that project, but you might want to grab a beater to drive around cause the car might be out of comission for quite a while.