John,
I have attached some of the comments of the drivers after the race and it seems McLaren was pretty downcast.
Note how they all wanted to come back but sadly some did not make it back. Flockhart died later in the year and Bandini died in 1967 and Stirling did not race in the NZ Grand Prix again.
Also note how Chris Amon is mentioned as a "newcomer". Little did we know then how great he would become in the next decade.

Name:  Ardmore post race comments.jpg
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Name:  Amon comment.jpg
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(Ken Hyndman's clippings )