Welcome to the Team Jason!
The big Chevys ran in series where they shared a lot of common parts. In your case it is the 1971 through 1976 model years where you can find interchangeable parts. Everything in frront of the fire wall will be the same year to year but behind the fire wall things like doors and sheet metal differed by model (two door, four door, or coupe or hard-top/convertible, and the station wagon having different parts from each other). Suspension and power train was all the same and except for the wagon even the gas tank should be the same.