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If u go to craigslist Phoenix and type in 1jz there are a few ppl selling the engine. not quite sure if it comes with ecu or harness though. hope this helps
please don't do the 1JZ, I've owned 3 1JZ vehicles. one I did for myself, and two failed projects by other people. and franky it's not remotely worth it. The 2.5L engine, just isn't torquey enough for the sc (or mkiii supra). You'd be better off buying a 2JZ-GTE or NA-T. you'll regret buying the 1JZ.