Guys - The roll pin is "never" a problem. The clutch pedal and the shaft is "always" the only insurmountable issue. I see this repeating itself in these threads. There is a simple, simple, simple solution (if you have an air hammer and a few bits).
Use the pointed nose bit that comes with most air hammer bit kits. Get the pin started with that. Use the proper 3/16 drift to simply punch it out the rest of the way. I've built over 50 of them and this works 1-2-3, a-b-c every time.
Now, getting the clutch arm off the shaft... that's not fun and yes, I've used more heat than you can imagine, from MAPP to Acetylene. I've soaked them for over a month. Some... will probably never come off.
You have a slightly better than 70:30 chance of getting it off... so, give it a shot. As mentioned here, it's a pretty damn easy rebuild. Once you get it apart, I would consider sending it to a local plater to help stop future rust and brake fluid issues and, get bronze bushings (I don't care what Bruce Anderson says).