Crank Pully Bolt Size?

[Robert Watson <robert.watson@domain.elided>]

Hi All,

What is the size of the bolt on the front of a 1750 crank, is it 37mm or
38mm?

Thanks,

Robert Watson
Novato, CA 
69 Spider
67 GTV

PS: Yea, I know the answer to this probably has been posted monthly for the
last few months, 
but never blew out my water pump until now so I can't reacll the answer

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