What engines can be used in place of 2.6L motor in 1990 Isuzu pickup?

In place of the 2.6L motor in a 1990 Isuzu pickup, you can consider using the 2.3L Isuzu 4ZC1 engine, which is compatible with the vehicle's setup. Additionally, the 2.8L Isuzu 4FB1 engine is another option, providing more power while still fitting the original engine bay. Always ensure proper modifications and adaptations for engine mounts, wiring, and other components when swapping engines.