Make sure you have all the screws out, The Cluster will not pull out much, you will have to squeeze the plastic connector on the spedo cable end to get it loose, the wiring harness connector will need to be squeezed together to get it loose. Again make sure all the screws are out and then pull..
Its a real pain in the a** just make sure you disconnect your tach wires, speedo cable and wiring harness from the back or it wont come out and it wont really come out far enough to disconnect all of that stuff like ud think. I had to disconnect mine while laying upside down under the dash. Not comfortable or fun but ya gotta do what ya gotta do