have the head pressure tested for cracks
How an Aluminum Head is pressure tested for cracks
you said everything was done, so the head was resurfaced? the block too?
what head gasket did he use? composite? or mls?
head bolts or head studs?
if so how were they surfaced?
was the block bored? if so. what is the over bore?
was the block maganafluxed?
run each piston to BDC, and run your fingers all around the bore, and see if you feel any cracks