A used engine is a used engine... I wouldn't run a JDM unless it was rebuilt the same as if I were to buy one locally. You can often find 7M-GTE for pocket change... A friend just bought a complete engine for $80; The seller did a 1JZ swap and just wanted it out of the garage.
I recommend starting with a GTE for the oil squirters, the turbo oil ports are already open and tapped and you'll have the right cams and thermostat neck and housing.
What transmission are you planning on running?
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