I'm not sure that any engine being produced now will ever be comparable to what can be done with a jz right now. For one thing modern engines use throttle by wire instead of a throttle cable, not too difficult to overcome but it's still something you would need to consider. A far bigger problem is the theft protection that is built into new engines. With a jz all you need to make the engine run is the factory toyota ecu. Modern cars use electronic ignition switches and steering lock which must perform a handshake for drive authorization. Without the key, ignition switch, steering lock, and ecu from the original vehicle, a modern engine is not going to start or run