Piece of cake! remove wipers, take off lower windshield panel then remove the brake reservoir, remove the lower drain pan, remove two covers, disconnect out side ground then the positive cable, pull out so you can reach negative cable, then clean and brush off all component's that you cant get to because all things mentioned above. Then hope you get the right battery from (Auto Zone) NOT! Total time, 3hrs 15min. Note: make sure to mark your wiper position before removing, cost me 15min on that adjustment. Fiero battery, 12min job. Just saying.
When I used to work at an auto parts store, people would ask if we could install a battery for them, and we would tell them we had to go outside and look at it first. This is why. People with GM Minivans were always pissed when you told them no, because they had usually gotten a quote from a mechanic or dealer with substantial labor.