Thanks fellas again for the replies.
About the truck:
I bought it as a means of reliable transportation and a bit better gas milage than my Trans Am that I was driving every day. Unfortunately now with the motor in the Pathfinder gone, I'm back to the TA which isn't good on gas, or ideling in traffic.
I'm not looking to boost it or do any major upgrades and in all honestly, it will probably never see the offroad. So I'm just looking for a motor that will swap nicely with minimal complications that won't break my wallet.
By the way, I'm new to all of the actual names and series of the motors. Can someone tell me what mine would be? Thanks in advance.