Run Stand or Engine Dyno
Video: How To Break-In A New Engine Without An Engine Dyno
I think most of the pro-run stand replies here are fine and if that's what you have then go for it. Just be aware of the difference running an engine on a stand vs. breaking it in a dyno - the run stand will break in the cam (which is half the battle) but in lieu of a dyno the engine will still have to go in the car anyway to seat the rings. Like I said before, pick your poison.
Bottom line, most engine break-in anguish can be erased by using a roller cam. To me a roller is a worthwhile investment since they are all but guaranteed to survive the break-in process. Roller cams are just better anyway.