This is the one I use. I usually make it as a base and guests can add their own alcohol.

2 1/4 quarts 7-UP
6 oz. fresh lemon juice or /Real Lemon
1 6-oz. can frozen orange juice
2 6-oz. cans frozen lemonade
Recipe suggests 2 1/2 c. Southern Comfort

Chill ingredients. Mix in punch bowl, 7-UP last. Add ice, citrus fruit slices. Serves 25.