Hate to rain on your parade, but I've seen a roller cam go bad in less than 1000 miles.
You should be able to spin the pushrods if you back off the adjusters a bit, then tighten them until they are just at zero lash. You should be able to see if they are bent by spinning them. If one or more are really badly bent, you'll be able to see it easily and won't need to spin them.
The best method however is to remove the rocker assembly and roll the pushrods one by one on a piece of glass.
