FYI, the 1kzte uses a computer box. you might get the engine cheap but the electrician will charge you an arm and a leg for the installation. friend of mine spent 15k on the electrician labor and materials. and the 1kzte may be fast but its not as fuel efficient as a 4jg2. cuz the 4jg2 is direct injected. but the 1kzte runs smoother because it still has a pre combustion chamber unlike the 4jg2 (direct injected).
Another consideration you should consider is the vibration of the engine. Malakas ang vibration compared to a gas engine.