I installed them today after having to concede defeat yet again with the brakes. The car has never had a solid pedal like it should. An attempt to bleed them today yielded another disappointing result. Instead of just saying 'fuck it' and blaming myself for not doing something right, I examined the whole system, inch by inch, and I found the problem: The main line from front to rear has three tiny holes in it...just enough to cause havoc with both successfully bleeding the brakes and, likely, successfully stopping the car. Since I don't have one of these lines handy, I had to stop this process - knowing that I'll have to order / find one and start again. Since I'm at this point, I'm going to pull the whole system apart (something I tried REAL hard to not do) and replace all of the hard lines (soft lines are brand new). I've ordered completely new hard lines for both cars (or for me to screw up once and try again).
To make myself feel slightly better, I installed these clamps and did some interior cleaning so that I could accomplish something with the time I had available. I'll have to remove the seat belt adapter so that I can remove the rear section of the crispy rubber mat...which will then allow me to get to the rear portion of the brake line. I'm not really looking forward to this repair.