I meant outboard mount for the damper (the one on the wishbone) and inboard mount of the damper(the one on the inner wing), sorry for any confusion.
For most effectiveness the damper needs to 'see' as much of the wheel travel as possible and therefore the lower mount should be as near the king pin as possible. I tried two locations, the initial one had the damper mount directly above the tie bar mount on the lower wishbone and was ok, however, on the final incarnation of Minor suspension on mine I moved the damper mount nearer the king pin (I can't remember the amount but it was 1/2 " or so) and it made a noticable improvement. Also, due to the layout of the inner wing and lower wishbone you will never be able to get to the stage where the damper is at too much of an angle so don't get too caught up in thinking it must be vertical, if you do that you will loose the damper travel in relation to wheel travel and therefore make it less effective.
I developed mine over a period of years for hillclimbs and sprints but was road legal. There will be some on here that will say 'yes but that was for competition but that is too stiff for the road', however while it was stiff, it made the car hugely competant on the road. Also hillclimb cars are generally much softer than circuit race cars as hillclimbs are not as smooth as most circuits.
At the end of the day it depends upon what you want it to be as how the car is set up.