Sorry about your luck bud. I honestly dont think the dyno had much to do with it other than your engine was already on the verge of going boom. You say that you like to drive it fast and what not on the street? That would mean that you have to dog it in order to be fast right? Dont get me wrong man, I'm not trying to make it sound like I'm trashing you. Its just the fact that it was inevitable. You had an egg with a hairline crack on it for a while. When enough pressure got on it, it cracked.
I personally had a great time over at S&R. The guys there are not ones that will bend a customer over. If anything, they have bent over backwards trying to get things done for us here in the area.
Good luck getting it rebuilt... now make it a 500whp beast!