What is the biggest motor that you can put into a 94 Nissan hard body?

The largest motor commonly swapped into a 1994 Nissan Hardbody is the Nissan VQ35DE, a 3.5-liter V6 engine from the Nissan 350Z. This swap is popular due to the engine's performance and compatibility with the Hardbody's drivetrain. Alternatively, some enthusiasts have successfully installed larger engines, such as the LS-series V8, but these swaps require significant modifications to the chassis and drivetrain. Always consider local regulations and emissions standards when planning an engine swap.