Broke/Stuck window regulator - How do I remove it?

[JWPOORE]

I have a driver side window regulator on my 70 Chevy Blazer that I cannot figure out how to remove. It is stuck in the up position and will not roll down. The repair manual says to roll the window up first and then remove the 4 bolts and take out the regulator, but every other post I have seen on here states to roll the window down, then remove the side window, etc.

Problem is, I could not even budge the regulator out with the window up so I am not sure if there is a special way to remove it. Also, the regulator just turns in circles and is obviously stripped out because the window does not roll down when I use the vice grips on it to try and lower it down, it just turns.

Any suggestions on what to try would be greatly appreciated. Is there a difference in removing a regulator from a truck and blazer or is it the same procedure that requires the lowering of the window first? Thanks for any help you can offer.