there's a reason why they are called torque mounts.
the restrict/limit the motor's "torquing" motion. It's an issue with leverage as those small mounts are at the very bottom/front of the motor which is subject to the most force.
If you've ever removed the torque mounts with only 3 stock mounts in place and ran it on a dyno or even just revved it from the throttle body, you'd see the motion is quite violent and can often affect gear changing ability.
With the mounts that chet has listed above - it is possible to remove the torque mounts because the hardness of the mount is enough to counteract the overall torquing force.
Subsequently, you can also save around 8-10lbs or so by the removal of the steet and cast iron/aluminum mounts attached to the transmission and block respectively.