Can you post a picture of the stamped numbers on the front passenger side head?
Casting numbers of the heads + date codes, pics of those too.
What are the cast numbers on the block, at top of rear of the block, post pics of those too.
My experience is with 60s and earlier blocks in cars and trucks, not marine. It would be helpful to see all the numbers you can find.
Are you asking for this due to curiosity or to try to find an engine to match your Holden?
Don
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63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 1963- Pontiac top selling car in Canada
Mahone Bay, NS Still not old enough to need an automatic
63 Parisienne sport coupe (The Big GTO), black, maroon interior, 409 4 speed; former owner of a 59 El Camino, 63 Corvette SWC, 62 Chev Bel Air SC. 1963- Pontiac top selling car in Canada
Mahone Bay, NS Still not old enough to need an automatic