MK3 w/ 1uzfett will make you famous.

there's quite a nice little bit of information out there on the 1uz boosted. They came from the factory with forged crank and rods. Pistons are cast so if you want big power Arias sells a boost piston for the 1uz off the shelf. Most of the good stuff for the Lexus V8 is available out of Australia. Such as bellhousing adapters for running a C4/TH350 behind it as well as some really nice stand alones such as Autronic.