After some comments by finders, I decided I would make this a regular sized cache. The new container is still in the same area as the original container, so the coordinates still work.
Part 1 is the starting point for this cache. It is an iconic structure in the parking lot commemorating the hometown of a famous individual born in Iowa. There is a 4 digit number on the monument.
A B C D
At the west end of the building in the same area as the above monument, there is a musuem honoring both the individual and his works as well as the town of Riverside. There is a three digit address on the front door.
E F G
Part 2 marks the actual birthplace and is found at
N 41 28.(B-A) (C+D) (F-G) W 91 34.D G (D-E)
The birthdate of this person is: (convert the month into a number)
H I J K L M N (month, day, year)
Part 3 is a favorite boyhood park of this famous Iowan which contains the physical cache. It is an ammo box.
N 41 2 (E + F).(I - J) (C + N) G W 91 3 (H + K).(M - I) (L - J) (C-A)
You can check your answer for the final location here.