So you have a tight engine which you can barely turn trying to remove the 6 pressure plate bolts.
Guess what? You only need to turn the flywheel 120 degrees in order to remove all 6 bolts with a half inch drive air impact tool and a long extension.
How so, you may ask?
You remember that door plate held on by 2 stovebolts at the top of the bellhousing? Take it off.
If you turn the engine over with a pry bar until you reach the tight spot, then back it off until a bolt can be seen through that top hole, you can remove that one with a you air impact as well as the bolt directly below the bellhousing.
Now turn the engine 60 degrees, take off 2 more bolts, then turn it another 60 degrees and remove the last 2 bolts.
That is a total of 120 degrees, or one third of a revolution to remove all 6 bolts with a power tool.