Yep..........Three timing chains, one for each head/cam set, driven by a main chain from the crank to an intermediate sprocket. All hydraulically tensioned. Open the oil fill cap and look down in there with a good flashlight.
The manual recommends and the engine controls are set up for 87 octane gas. You can pretty much run anything you want EXCEPT E85. The jury is still out on the present Corn Belt lobbying efforts to change the oxygenate level to E15.