When I made them, I went a little lighter on the tequila and the gin, and a bit heavier on the rum and vodka. I used the "One, one thousand, two, one thousand" count method to pour.
Mine was more like
1.3 oz vodka ( 4 count pour)
1.3 oz rum (4 count pour)
.7 oz gin (2 count pour)
.7 oz tequila ( 2 count pour)
1 oz triple sec ( 3 count pour)
1.5 oz Sweet and Sour mix ( 4 count pour with an extra "one thous")
Splash of cola
garnish with a lemon wedge.