A very interesting article. I notice the second design rods looked suspiciously like the Pontiac versions. I always wondered if Chevy did anything similar to our cars. This is the first I ever heard about them adding bars. Then again, I once worked on a 1967 Camaro six cylinder car. They were known for tearing the weak DS motor mounts out. Under a recall, they had added a short length of stranded steel cable with loops at each end. The ends were bolted to the engine and the cable looped around the upper control arm shaft. Quite the band aid, but I have to admit, I copied that fix. I always add a short length of chain from the engine to the upper control arm bolt. It is a 'torque strap' that limits engine twist and saves the DS motor mount. It is just loose enough not to transmit audible vibrations through the frame. This is especially important on a manual trans car.