I was reading posts and some people were running into trouble from not having harnesses or a few other things.

My big questions are:

I have the ENTIRE donor car(wrecked 93 trans am), all the wiring components, transmission fuel pumps, radiator, ECM, everything it comes with and putting it into a 305 TBI compartment.

Besides the air conditioning is this a simple swap if I use the trans am dash and everything?

I know I'll need to add in another fuel line and some power steering stuff but I was going to make try and make it easy with braided stainless steel. Other than that, what am I looking for?

Also, can I use almost every part from the trans am including fuel lines?

With having the TBI you won't need the fuel lines just from your lines to the lines to the intake.
You wont need to use the dash unless you just want to swap it. You can wire it in to make the gauges work if thats why you want to swap the dash.
Other than that its a rather simple easy swap.

Wires into the c100, some power to the LT1 harness, i can use the same VATS I already have and it's pretty much good to go after i grind the mount and smash in the frame a little for the a/c right?

I have the TBI and not the TPI, I'm not sure if it has a return line or not. Also, can those hoses from the TBI hold the pressure from the TPI?

I'll be getting to work on tuesday