Dave,
Have a look at the 2nd photo down:
http://www.jemsracing.co.uk/cs_widetrack.html The photo is of an Escort racer taken from the underside but shows the normal TCA at 90* to the frame but there is a strut going from the outer end of the TCA at an angle back to the frame - this is the compression strut. Its adjustable for length that allows the caster to be altered. On the Escort the inner pivot is fixed but I reckon that if the bracket is mounted vertically you could drill several holes to give the option of raising the pivot point that would result in anti-dive. The other thing to note is that the anti-roll bar is detached from the TCA and is operated by a link from the MacPherson strut itself meaning that there is plenty of potential for mounting the connection to the anti-roll bar anywhere along the trailing arm of the AR bar to increase the roll resistance. Doing all this means that the TCA itself can be made adjustable to change camber with the compression strut taking care of the caster, the whole unit being a fabricated wishbone.
Clive