I frequent " Ray Barton Racing " On the SS Darts and Barracudas they must use all factory parts . They can be modified or from other brands of cars that is why they can run a 9 inch. The rules say factory production parts but do not specify that they have to be brand specific .
They must use Factory strut rods so this is what Ray did to prevent fore and aft movement on foot brake. These hymn joints thread right onto the factory rods. I have a bunch of them along with joints left over from the sprint car. So we copied his cars when we made the new K member. The movement is very smooth . The new cars use adjustable struts as in the last pic. I went with making my own because I am cheap.
One thing I noticed and he also corrected on his cars is they fastened the lower A-arm pin by threading the pin and putting a bolt from the rear to stop the a-arm from sliding off the pin. A must when using poly bushing on the lowers . We are making bronze bushings. we also cut the factory K so the pan can be removed in the car. Here are some pics so far and some of the hemi cars at Rays.