Option #4......
Get a used engine from the JY, around here we can get them for $200.00, buy a engine stand for $40.00 and rebuild it as time & money allow while your driving your truck. Then once it is done, swap it in on the weekend.......might want to save for a clutch package as well before the swap, unless yours is newer.
Your new engine could look like this!
This way you'll learn some things, and when you get the old motor out, you may even be gung ho to jump on that one to and sell it!