Engine rotation = more traction?

[ALLMTR]

The engine will only "torque" one way in the engine bay and that is opposite to the direction the wheels are turning. If motor is upright and east west, cyl head will move towards firewall upon accelerating forward. Will move away from firewall when you accelerate in reverse. Crank rotation will not affect this. A mount on the rear of the motor will push down on the chassis and a front one will lift up on forward acceleration......

[spetz]

So basically get stiffer front and rear engine mounts so the engine doesn't move backwards and forwards as much?

How much extra traction would this give as opposed to how much vibration into the cabin??