Need advice,going to school, bad motor :(

Im gonna make this the abridged virsion. I bought a 92 gt 3 weeks ago. Before, I had another 92 gt. The new one was claimed to have a 306 block, and have only about 20k on rebuild. I decided to leave it in. Partly becuase my mechanical skills are about a 6-7 outa 10, and the other was I didnt have a puller. I left my other block with 3000 miles, 306, forged pistons and Crane 2030 Cam out and just bolted on my heads and intake and other piss-on bolt ons.I have it running, or did untill tonight. It never leaked oil until tonight. I had a knocking whenever I would start the car, I would give a little bit of gas once, and then it would dissapear and idle at 800 R's.This happend at every cold startup. Today I put in new PCV valve, hose, and upper intake gasket, and switched my fuel wiring harness beacause of another problem I dont want to go into detail on. Thats it. The car will start and then die. Knocking still there. The fuel pump I just put in sounds akward. IDK what its problem is. It doesnt have the wine that it should, it just like its a busted ass.Basically Im at the end of my rope. I dont have alot of money after paying too much for the car. There is no warrenty, and Im trying to go to school to do this for a living. I will do everything myself, wrong or not, and build off my mystakes. Taking it to someone to do anything other than a DYNO is not an option. I have to major questions. What the **** is the cars problem now, and with my ability to perform rear end work and head intake ect. Would I be bale to take a motor swap if I had the right tools? Guys.... all your advice and opinions will determine what Im going to do with this situation. Please help me!
 
Im located about 30 mins outside of Dallas. Is there anything I need to do specialy when I get down to seperating the engine from the trans? My biggest fear is not being able to align it and and hook it back up. Anyone have any articles or sites/material with pictures or a how to? Also should I take the top end off this while im waiting for the picker and assemble everything on the new motor but the upper intake?
 
Actauly you can pull the motor with the trans attached.This way you cant fudge the hook-up.No,dont take the top end off,some time you need to use a plate that bolts to lower intake or a strap/chain that will wrap around it.
 
Other than that,its just the mounting bolts (2 bolts in the center of the cross member),un bolting the drive shaft and sliding it out the back (easy)unbolting the shifter (again easy),and the mention clutch cable and speedometer sending unit (little box near end of tail shaft,has one bolt that holds it on).

Just look around under there,you decied what looks better for you.