What engines are compatible with a 97 Nissan truck?

I have a 97 xe Nissan truck that has a 2.4 engine. What other engines are compatible with this truck. I have heard of someone using American engines in this truck . Can this be true? Is there a 6cyl that will work in this truck?|||You can replace the 2.4L KA24E with the 3.0L V6 VG30E engine. Nissan never offered a V6 in their trucks after 1995 but they should still fit right in. You can probably put a small block engine in it since the engine compartment is large enough to accommodate it.one|||The truck you have could have been purchased with a 3.0 L V6 when it was new. Your best bet is to stay with the 2.4 engine and just put some hop-up parts on it. Nismo (Nissan's performance division) used to sell a head for racing that would give this engine about 200 hp. Otherwise changing the engine, wiring harness, upgrading brakes/suspension will cost more than a vehicle is worth. Hope this helps!