If timing is retarded this can cause overheating and blow head gasket.
Suggest you advance before driving again.
Remove spark plugs after engine reaches operating temperature and crank over and see is water comes out of cylinder/s.
DON'T STAND ALONG SIDE OF SPARK PLUG PORTS WHEN CRANKING.
You can try pulling one spark lead at a time to see if engine changes tune to pin point the cylinder at fault or if gasket is blown at that cylinder.

ANGRYWOG

NAH, I DO NOT RECALL THE AD.

  WOG

THEY HAVE MEETINGS AT THE RSL HALL 1 FRED BELL PDE EAST VICTORIA PARK ON THE SECOND TUESDAY OF EACH MONTH AT 7.00PM.
YOUR CAR DOESN'T HAVE TO BE FINISHED TO BE A MEMBER.
PS  THE PIZZA'S ARE OK.
  WOG