Rinse the chicken parts, put them in a large stockpot, and cover with cold water. Heat to boiling. Reduce the heat and skim the scum from the surface. Simmer 1 hour. Add the remaining ingredients and simmer gently uncovered 4 to 5 hours.
Remove the solids with a slotted spoon or Chinese skimmer. Pour the stock through a cheesecloth-lined strainer. Let cool, then refrigerate until cold.