If you got the belt on somehow magically wrong, I am forever going to call you "The Magician"

If you can't see it leaking, But the belts squeak there'* probably water on them somewhere, Figure out where it'* coming from. Your water pump maybe out.... maybe the coolant bypass hose is faulty...

Wait. Did you bleed the cooling system? That would cause it to overheat.
Take off the radiator cap
Start the car
watch inside the rad until you see the flow open up.
on the T-Stat housing is a flathead screw, loosen it.
Leave it open until you get a steady stream of coolant and get all the air out.
Close the screw down, put the rad cap back on.
See if it still overheats, If so, I bet water pump or bypass hose.

The belts arent sqeaky but its making a knocking or a rocking sound and Im pretty sure that its one of the pulleys because when I turned one of them with the belt off it seemed like it was the one making all the noise. Oh and yes I bled the coolant system when I started this project but refilled it. Hopefully what you said will fix it and I will do that first thing in the morning but where might the thermostat be? And when I loosen the thermostat screw or whatever do I watch inside the radiator hole like you mentioned to determine a steady stream? Sorry Im a newb but thank you so much for your help and hopefully this will fix it.

OK I figured out what I have to do and am headed out there right now. I feel very confident that this is the problem and have no doubts whatsoever.

Oh I need to get a new heater pipe because the bracket that has the screw hole in it which mounts it to the LIM is bent and the pipe isnt in all the way because of this. Any idea on what the part number is for this and maybe a price? Its pretty hard to take out and I dont think I can do it without removing the power steering pump which I cant seem to do. There is only this metal line that runs to the bottom of the power steering pump that is in my way so maybe I'll just loosent that a bit and then pull out the heater pipe.

Its not working I take off the radiator cap and loosen the little brass valve and even though it seems like all the air is out its still overheating. How steady of a stream do I need? Its not like an even spray but more like spurts so does that mean that there is still air in there? Plus my coolant keeps running out while I do this and the temp guage is in the hot zone so I get worried a bit. Im out of coolant so Im sending my dad to go get some and I will try again but if it doesnt work then I guess I'll have to take the car to Pontiac tomorrow.

ITS ALIVE! ITS ALIHIHIHIVE! I was doing everything else right but being the moron that I am it turns out the radiator didnt have much fluid in it so after I filled her up she is working flawlessly and the horrible noise I was hearing from the pulleys is now gone. I think it was the water pump spinning without any water going through it, lol. I'll be changing the oil tomorrow and am now considering getting that exhaust system for Christmas. You guys rock!

Replace the intake manifold and gaskets or youll be sorry. NAPA has a replacement manifold for around 150 bucks. read my post please.

Uhh... no?