Marcus -
Vis-a-vis adjustability-wise, the mount for my upper A-arms (in the pic) have a very large range of adjustment available. The horizontal shaft of the upper A-arms is bolted to a section of partial box channel, cut away to roughly a "C" cross section (where the upper part of the C is longer than the lower part). It's 1/8" steel, so is very rigid.
Now, the holes in the "C" that the upper A-arm bolts through are slotted, longitudinally relative to the car's length. This gives considerable castor adjustability (slots give 1" of fore/aft range of movement for the upper A-arms).
In addition, the "C" bolts to the frame through
vertically slotted holes in the frame's mounting plates. Due to the angled sides of the frame in this area, the adjustment range is enhanced. The inboard end of the upper A-arms can be adjusted up & down over about 1.5" of travel. So, camber, upper A-arm inclination, and even some anti-dive adjustments are available there.
All bolts are 1/2" NF grade 8, with Nyloc nuts.
With this setup, I was able to get the alignment pretty close to my desired starting point. After adding some thin aluminum shims here and there to fine-tune, I now have 8* castor, -1.0* camber at rest (increases to -3* at full compression), and 1/16" toe. Ackerman is adjustable, too, as the steering rack is mounted to a steel plate with slotted holes, giving the rack about 2" of fore/aft adjustment. At the moment, the Ackerman "looks" pretty good, but I don't know enough about calculating it to know exactly what it should be, so it will be a trial & error kind of thing once the car's on the road.
I haven't even looked at anti-dive adjustment...my severely capacity-limited brain is already full just getting the rest of it right! Who knows, maybe one day I'll consider it.
I don't know if you need (or want!) any of this, but I always figure that I can ignore information I decide I don't want, but I can't use information I don't have. Hopefully there's a nugget in here that might be of use to you, or perhaps someone else following this thread.
The explanation above might be a bit confusing, so here are a couple of pics of the upper A-arm mount, from the outside & inside.
Attachment:
upper a arm mount 1 small.jpg
Attachment:
upper a arm mount 2 small.jpg
Just shooting some ideas out there...
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