I went out to take a better look at the motor and what I thought was a missing chunk was actually part of the piston that melted. I couldnt tell until I ran my finger over it and it scrapped right off. So thats cool. Also the slight wear marks are pretty much imperceptable. I'm going to take it to the machine shop to get it checked out but I might be able to get away with just a hone and some new piston/rings.

But yeah I still think it was detonation/worn out piston/boost spike that killed it.

I also need to figure out why cylinder 1 was at 100psi. I'm going to pull the block out later this weekend and tear it down and see what I get.