[Yoda]

Once my back is facing the target I think of turning my shoulders and upper torso and let the arms follow. I hit the ball sweet long and straight.
Heres my question is there any mention of this in TGM?

Not only is this move in The Book, ralphs007, it is considered the Master Power Accumulator (of four). Its basic function is explained in 6-B-4-0 and its Maximum Power and Maximum Trigger Delay are explained respectively in 6-B-4-A and -C.

It is the period of Shoulder Acceleration during the Start Down (8-7), i.e., the Pivot (7-12) transporting the Power Package (6-0) before any independent movement of the Arms occurs (6-K-0). The initial Thrust thus supplied, the Arms then Deliver the Loaded Power Package to the Release Point. This is the period of Hand Acceleration (8-8 ).

Then, the selected Release Trigger takes over -- Left Wrist (Swingers) or Right Arm (Hitters) -- and Delivers the entire Primary Lever Assembly (the Left Arm and Club) -- into Impact. This is the period of the lengthening Right Arm (6-A-1; 6-B-1-0; Active/Hitting or Passive/Swinging) and Clubhead Acceleration (8-9).

All of which leads to Impact...that most delicious period of Ball Acceleration (8-10).

In other words...

CRACK!!!