Yep, drown the cam, and once you start the engine, let it run, and run, and run, and run... 40 minutes minimum, 1-2 hours is ideal unless you have some crazy ground cam on an engine that is going to see a lot of stress, in which case longer is normally better.

Also, if your cam came with nitride coating, you should take a good rag, or a 3M scotch-brite pad and wipe it off of the cam lobes and cam journals before installing the cams. That stuff can clog oil galleys, and if some of it is stubborn, it can cause a catch section that will increase wear on your rocker arm pads.