Blowby, undersized Piston Rings, and 1/2 second
I wonder if he re-torqued the heads after the engine was brought to operating temps the first time.
Prolly re-torquing the intake/valve covers/headers/etc woulda been a good idea too.
I cant see the deck being the problem. wouldn't the head gasket blown out long before?
Judging by those pics... I'm convinced the cylinder bores are the culprits.