Here's a little history on my car..
Got it 2 years ago, it hasn't been driven for at least 4 years.
86 IROC with a 700-R4

I went to drive it away from getting brakes done, and the car wont shift out of first.
Any suggestions on what i should do to get this fixed?

Whenever you accelerate, if give it gas up to about 3,000 ,and then let off the gas.
It is like you put the car into neutral. Tach falls down to about a grand. Whenever i give it gas again, the tach gos back up to about 2,500, and then it is like it engages back and i have power, but it doesn't wanna shift..

have you checked the govenor gear

is the tv cable hooked up or broken

try adjusting it if it is hooked up properly

sounds like a stuck governor.can you get a wide open throttle 1/2 shift at 5000 rpms?

yeah i had the same i mean same exact thing happen to me in my 86 even though the tranny wasnt an 86 but they are all the same well i got under the car and noticed that the govener cover was dented in and not allowing the govener to turn freely..

any way i put a new govener (the one out of my old tranny) and cover on it and it to this day shifts perfect....

so give that a definate looksee

I bet your brake guys took it out and did a few spectactular burnouts and quickly got traction, or took it for a brake test at high speed and locked up the rears. My father broke my governor a few years ago on my old 86Z while spinning em hard on ice and then hitting dry pavement with low power. It only has plastic gears and thus large g's on the governor will shear them apart.