blown head gasket, chocolate milk!

drained 6 quarts of chocolate milk from a 4 quart oil sump. Motor only ran about 10 minutes at about 700-1000 RPM. Im guessing 2 of those quarts were distilled water (coolant). Did I fubar the bearings? I was trying to diagnose a terrible miss, the back two of 4 cylinders have intake ports that are joined by a connecting passage for some reason and they were so lean from an open vacuum port in the rear runner that they were not supporting combustion. I finally figured it out (I thought the head gasket was bad but I had 140 psi on all 4 cylinders) plugged in the line and then the thing started running decent but progressively got worse. I finally shut her down and saw the oil in the cap was milkshake. It was running bad on all 4 for about 5 minutes. Never overheated.