Hi Pavel,
What we did was to cross brace the chassis in the area formed by FF1, BR1, BR2 & BR7, this provided a node for the shock bracket to weld to. Further stiffening was provided by a bolt on sub frame that tied these & the rear upper suspension brackets together.
The pivot points are in line with the centre line of the car and the shock mount on the wishbone, so standard Haynes Roadster parts could be used. They also provide a rising rate to the front end. The layout, I felt, was the easiest way to package the shocks in the nose of the car. It also allowed for a front ARB to be fitted should it be needed.
The shocks in the diagram are about 30 degrees off vertical, they are shown at ride height, so obviously at full length and full comression this would change. It's important when designing the rockers to end up with either a straight or rising rate, it would be easy to design it with a falling rate which would result in suspension that bottoms out easily.
Kind regards
John
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