omg, the side piece of the piston is cracked and are those valves bend!?...guess Cams were not set right from the start. And definately, it's been over boost...the whole thing was not installed properly as well. PLus, the engine was pretty fried up...i reckon that you should go back to the shop, ask him what happen to it. If you got everything from that shop and installed by them, you should have a fair reason of why. There is also some engineer test report to certify what is wrong with the engine, causes and all. if it's not your fault, you might wanna take some action, If you got your reciept.
still.

but one more thing, did you take out the head yourself and take those pictures???