Yuck, broken rings, burnt pistons

[O'l Buck]

my $20 327 is now down to bare block. I found out for sure where all the oil was going now. The moron that put the thing together forgot to stagger the ring gaps, and it has 2 pistons with burnt tops, broken and burnt ring lands, broken and missing pieces rings. Thank got it didn't hurt the cylinder walls. It's already .060 over and I'm not real crazy about boring it any more. It's been a long time since I've seen pistons in this bad of shape. Can anyone tell me what caused the burnt pistons and broken lands??? I forget what all will do this. The engine is only supposed to have less than 500 miles on the overhaul and I'd believe it. The bearings still look new and so do the pistons that arent destroyed.

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Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

Angel girl: 67 Cutlass convertible
330, 3spd stick

Greener: 90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

no name yet: 72 442 under serious construction