Will a 2JZGTE engine fit in a 2003 Nissan 350Z?

Yes, a 2JZGTE engine can fit in a 2003 Nissan 350Z with proper modifications. However, significant alterations to the engine bay, including custom motor mounts and possibly adjustments to the transmission and drivetrain, will be necessary. Additionally, considerations for wiring, cooling, and exhaust systems must be addressed for a successful swap. Overall, while it is feasible, it requires considerable effort and expertise.