Would swapping an engine out of a Nissan 300zx for a Nissan GT-R engine be an easy swap?

Swapping a Nissan GT-R engine into a Nissan 300ZX is not an easy task and would require significant modifications. The two engines are different in terms of mounting points, wiring harnesses, and supporting systems, such as the transmission and exhaust. Additionally, you'll need to address compatibility issues related to the vehicle's electronics and potentially upgrade other components like the fuel system and brakes to handle the increased power. Overall, while it's possible, it demands extensive knowledge and resources.