3 parts Triple Sec
1 part Light Rum
1 part Dark Rum
1 part Vodka
1 part Gin
1 part Vermouth
3 parts Sweet & Sour Mixer (Tavern brand is best)
6 parts Coca Cola (try not to use Pepsi, it's too sweet for this)
1/2 part Tequila (optional to taste; I never added it)
and, of course, Ice.
There are many recipes out there, but none surpass this one. Many thanks to Dave Fun and Bupos (what was his name again?) for giving me and the world the recipe back in 1983.