I have two juvenile males in the same tank. They've been in the same tank since they were neonates. They were wild collected and kept separate until I noticed the screen was coming out one of their lids. Knowing that these guys will eventually find an escape route, I put the two together in the good tank. They showed no aggression towards each other, and I decided to just see what happens. Two years later, they both are near breeding size, and seem to be communal. They are currently in a fairly large tank - but wherever one is, so is the other. They always shed within a day of each other too, it's freaky. I guess not too freaky since they are fed the same amount and kept under identical conditions.
Turtle Bay keeps all of their adult kings together, they have three I believe in the same enclosure, 1.2 breeding family (their eggs never hatch though, I know why - they don't properly brumate. Their version of brumate is turn off the heat in the tank, which is in a room kept at room temperature comfortable for people). Anyway, the biggest one in their is over 4 feet and the smallest is about 3 feet. They keep them well fed. They don't try to eat each other, at least not yet ...
Sometimes it works, sometimes it doesn't.
Some reasons to avoid it - if you see a stool that looks odd, which snake did it come from? If you see a regurgitated mouse, which snake did it come from? If one gets sick, there's a good chance both are sick.
-----
3.0 WC; 0.3 CB L. getula californiae
0.1.1 WC; 0.0.3 CH Elgaria multicarinata multicarinata