i am not too sure what your problem is.... leaning back is fine and done by almost all big hitters, as long as you weight is on your front foor then you can lean all you want. your head should stay relitivly still and when you weight shifts foward you head will stay still and the lower body will move foward it creates a lean.

if i am hearing you correctly you are saying you look like this at impact?

http://www.golftipsmag.com/content/i...struction.html

or

http://longdrivers.net/KevinOsborn.htm

not sure if these people are good at golf or not but they sure do hit long