Some of my experience in no particular order:
If you want to keep your distributor the way it is, and just have it rebuilt, Advanced Distributors can do it. I did this a couple of years ago, and I believe it helped the car. I was only a few hundred bucks. I actually sent them a used distributor from a friend, so I didn't have to take my car off the road to get it done. http://advanceddistributors.com/wordpress1/
I also replaced all the springs in the linkage, and got the plastic cap Einspritzer references. And I bought the three linkage pieces, measured them, and installed them. Just going for a solid baseline. One thing I have not done (mostly because my car runs fine) is sync'ed the pump to the throttle.
I recently had an exhaust bung put in my tii's downpipe, so I can tune it (or at least see what it is doing currently). That will be a project for next summer.
I do have an old Roundel article where they talk about tuning a tii's AFR without the data from an AFR gauge. I'll be curious to see what Einspritzer says about that.
It makes a lot of sense to me to get the linkage and the ignition straightened out before attempting AFR things. Big picture, I view it as eliminating variables. There are many to begin with, but once the linkage is solid, and the ignition and timing are correct, then you can move to the actual KFish part. Just keep on eliminating variables.
I notice my tii runs a little different in summer and winter - I theorize it is the blend of the fuel, or the ambient temps, or a combination of both? I don't know that for sure, of course.
I have not heard about that gauge of wire issue in regards to the fuel pump. Totally makes sense. Very interesting.
I did have an idle hunt that cropped up - I was able to adjust the screw inside the tuna can a tiny bit to eliminate it. I made it a little richer and that cured it. Really want that AFR gauge...