Re: Replace 6MT clutch pedal bushings?
I just did this a few weeks ago, had the exact same situation, 31301P was shot and I'd had an awful groaning noise for a long time when pressing and releasing the clutch pedal. Like you, I wanted to replace the bushings without totally removing the clutch pedal assembly. I took a photo of the spring and bushings in place from a couple of angles before I pulled the spring out, so I'd have a reference when putting back together. I also found the exploded diagram from the link above to be very helpful reference.
While the spring is pretty stout, removing it wasn't terribly difficult, just grabbed it with a pair of pliers and was able to wrestle it out of the slot on the clutch pedal without too much difficulty. Getting it back in is another story. One thing I will recommend which I think was mentioned by others - it's easier to put the spring back while the clutch pedal is fully depressed. I see no way that you yourself, or a helper, could hold the clutch pedal down while you're trying to reinsert the spring, not enough room to work. Instead, I found it pretty easy to use a small c-clamp to hold the pedal down, there's a pretty natural place where the pedal and the pedal stop come together and the clamp can hold it in place while you work the spring back in.
As for getting the spring back in place, I was able to do it using a pair of needle-nose vise grips. Seat the top of the spring properly in the 31353 bushing (which for me wasn't badly worn - I replaced it anyway), then grab the other end of the spring near it's end with the vise grips, this is what you'll fight back into the slot where you've seated the new 31301P bushing. I had to mess around with where I grabbed the end of the spring and at what angle with the vise grips before I found the optimal leverage to fight it back into the slot. It was a pain in the butt, but the whole process probably only took 10 or 15 minutes, and totally worthwhile, the blissful silence of my clutch pedal now makes me wish I'd done this long ago. If it wears out again in a few years, it won't be so bad to do it again. Good luck.