Bolt the head back down with the old head gasket and apply compressed air to the spark plug holes. Who knows what you'll find. Maybe those 2 pistons are missing rings. Stranger things have happened. If you're not leaking air into either port or into the crankcase, something's probably suspect with the valvetrain.
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1968 Firebird - IAII 535 - FAST Sportsman - 4L80e - PTC 10" triple disc 3800 stall - Moser 12 bolt 3.55 - Caltracs - Hydraboost
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