What do the Kafer Cup cars use?

[DORIGTT]

I would like to know what the ball-joint front and I.R.S. rear Kafer Cup cars did to improve the handling of the cars.

Things like shock/spring or shock/torsion bar combinations.

Alignment settings.

Chassis bracing. ( I saw a pair of braces going from the tunnel behind the rear seats horizontally to the rear?)

This information would really help me in my quest for my German Look Ghia to not be all show and no go.

Thanks in advance.