junk it and buy a jeep..lol..ok ..this is what i think and since im your best friend im going to post it so the nissan people that know more than me can say if im right or not...
i think buying another 3.0 and rebuildint will be the best option..do to the fact that we cant weld...orhave super swaping engine skills..im sure we can pull it off but it requieres money and time...which we barely have...i dont know how good or how bad your engine is...as an engine (3.0)? is it a good engine worth fixing? idk...you nissan gurus tell me...
now..i dont have anything against nissan..but...you paid 800 bucks..the truck is worth more than that running in great conditon..which it really isnt..you can find an idiot that wants to pay more..or sell it for..w.e you can get and get something else? but then again what warranty do you have than buying a jeep,nissan,toyota or w.e is going to be better?
you already have it and you like it...but i think nothing its worth fixing if you arent really sold into it...thats whay i think...