Macaroni Salad for 100

6 lb. fully cooked ham, cubed
6 lb. macaroni, cooked & drained and rinsed under cold water and drained
3 lb. shredded cheddar cheese
2 bags, frozen peas, thawed, 20 ounces each
2 bunches celery, chopped (12 cups)
2 lg. onions, chopped (2 1/2 cups)
2 cans pitted sliced ripe olives, drained

Dressing
2 qt. mayonnaise
1 bottle western or french salad dressing
1/4 cup vinegar
1/4 cup sugar
1 cup light cream
1 1/2 tsp. onion salt
1 1/2 tsp. garlic salt
1 tsp. salt
1 tsp. pepper

Combine first 7 ingredients. Combine all dressing ingredients; pour over the ham mixture and toss well to coat. Refrigerate.