I want stiff motor mounts for my d series, but the only offering is the prothane or ex kits. I believe only one of them offers a 3 piece kit even. I'm not sure if they will do what I want. I'm using 3 mounts and want minimal engine movement without regard for vibrations.

Is there something more stiff than window weld to fill the stock ones? What have the hardcore D'ers done to stop this flexing?