sorry 2 hear about the engine problem dude you can get a rebuilt for 2195.00 at my dads shop it has a 3 year 36k miles warranty call all engine distributing at 559/266/3474 i talked to my pop 2 today and he has one -i would nor recommend messing with this engine unless u rebuild it totally because if u just put head gaskets on it it will use oil and probably not hold together any way because alot of things go bad when the motor gets hot like that -so if u fix the head gaskets then u will have ring problems ,if u fix the ring problems ,you'll have other problems and so on and so on
i was at his shop the other day and he's got a 3.0l diesel that will bolt up to your tranny ,we were fooling around with engines and tranny's and i set up this diesel with a w56 tranny and transfercase and took measurements on the motor mounts and found out it will slide right in where a 22 r or re motor is so if u had the 4 cylinder it would drop right in -the center of the motormount is 14'' from the trans mating surface i did not measure up a v-6 motor but it would not be hard 2 slide it into your rig but id turbo charge it or don't use it -a diesel will have lots more torque than your gas motor would ever dream of producing and it will get better milage because diesel engines are more efficient than gas you get more btu's from diesel than gasoline -too bad u didn't buy my 3.0l motor i had for sale all it needed was a valve job 'but its gone -if there is anything i can help u with let me know
grumpy