I want to replace my 76's existing shocks with KYB's because I hear they are the "poo poo". I've never changed shocks so I was wondering if it was as simple as unbolting the old ones and bolting the new ones on? Do they need adjusting, and if so how is that done? Also, if I lowered the suspension would I need to do anything to the shocks like re-adjusting? thanks for the help on a newbie question.