The last PB Racing Dart car run by Keith Plested had a significant number of modifications made to it.
The pictures below show the Lauterbacher shock absorbers that were fitted to the front.
Click on the thumbnails for a bigger view.
Different length rockers were made to make better use of the Lauterbacher shockers.
A drawing of the rockers Keith Plested made to make better use of the Lauterbacher shock absorbers is shown to the left.
A bigger version that is suitable for printing is available by clicking on the image.
I think it may be beneficial to angle to top of the new rockers to get better movement with the pushrods - see image left. Assemble as a pair, obviously!