Grandma's Punch

3 cups sugar
3 quarts + 3 cups water, separated
6 oz Jello (strawberry)
64 oz Pineapple Juice
2 liter 7 up

Combine 3 cups of sugar with 3 cups of water in a large pot.  Stir until all sugar is dissolved.  Bring to boiling and let boil for five minutes.
Add Jello and stir as it is added.  Slowly pour in 3 quarts water and stir well.  Stir in pineapple juice.
Freeze.
To serve, let the punch thaw until slushy.  Add 7up.