I find it kinda interesting that it looks like they all died in the same spot on the piston..
And per a discussion on the phone yesterday these are the two primary pistons that always take the beating when something like this happens.
Also, after doing so searching it is known that KB blowers, even as far back at the 1.7 have see higher than normal IAT temps, so if there is a problem as noted by another fellow technician, that if the blower has an issue then the temps will be even higher than that, and will saturate the intercooler, causing higher IAT's and the distinct, high probability, of detonation and engine failure due to this.
and I quote:
Now he has a VT built engine and decided to run the 15lbs of boost. Guess what? The KB cannot run 15lbs as advertised unless your running race fuel even with a professionally built engine. Why? because the blower temperatures were over 200 degrees. Many people on Modularfords.com have said the exact same thing. Also, I have not heard of 1 person who made the 507rwhp on 15lbs of boost as advertised by KB even with the 23 degrees of timing on 110 octane. No tuner here in Toronto recommends any more that 12lbs of boost max with the 1.7L blower.
Now of course this is a different blower we're running, but still it is noted in the KB install manual about critical intake temps and that there MUST be cold air inducted through the outside of the engine compartment, WTF??? then why does this kit come the way it's prepared????
Well, I guess we'll see what happens at this point, I also got a phone call late, late lastnight for a counter offer on a built short block to handle 1500hp, and hand built here in Texas, again, more phone convo's will commence today, this isn't anywhere far from over.