Yes, but swapping in a 1JZ isn't easy since the intercooler and piping are different. Trying to get 300hp out of an N/A is going to cost you more than going with a turbo, and it will be a lot more time consuming. You'd have to do a complete teardown of the engine, and do a lot of internal work. On a turbo, it's mostly a matter of intake, exhaust, and more boost and fuel.
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