What kind of lower intake gasket you have? If they are black plastic then they should also be changed. If the intake gasket is aluminum your good and just do the elbows. You should be able to tell with a flashlight and a screwdriver by the front valve cover.

What does the coolant look like in the radiator? Is it all slimely? Dexcool turns to slime after 6 or 7 years, it also softens the plastic lower intake gasket.