I have a '77 Mini "Special" that I imported from Denmark.  It came with the
front end lowered about an inch, so in my normal driving I think I was
hitting the bump stops fairly often and the ride was not very comfortable,
especially at 65MPH!

I figured it would be good to retrofit the suspension, so a couple weeks ago
I fitted hi-lo's and the "blue" (soft) steel springs from sracer.com.
Adjusted it up to a level ride height (doesn't look like an American hot rod
anymore!) and it now drives like a limo!

However, I found it tended to shudder at higher speeds, like over 40MPH.  I
figured it was the alignment, which really had to be done anyway since the
height had been changed.  I set the toe to 1/16" toe out, which is the
correct spec, but still the shudder which seemed to come from the right
front.  I jacked it up and found the wheel was tight when shaken
side-to-side, but shaking it top to bottom, it was a bit loose!  That's how
I found the lower balljoint was worn.  Luckily I had a couple sets in hand
already.

I replaced that and it's close to ideal now.  I still get a good shudder on
hard braking, but I figure that may be the alignment again...since it
probably couldn't have been adjusted right with a worn balljoint.  Tomorrow
I'll probably tackle the alignment again, but that's easy compared to
replacing a balljoint!

I figured other folks might benefit from this history, and perhaps have
other ideas for finding the source of shaking when braking hard...