Body Drops?

[Gixxerboy]

hey there

asking about body drops now, I know what they are, but I am just not grasping the concept how it's exactly done.

should I do a body drop before I do air ride, or do air ride then the body drop??

does anyone have any detailed pics, or sites of how to do a body drop on my GMC?

what all do I need to replace? any suspension parts? etc?

because if you drop the body then what about the interior(cab) of the truck, would it be closer to the roof? would it look funny?

thanks for any help again
James