This is the pulley setup as mounted on engine - engine to the top- The spacers are between pulley and base-plate of the engine. Using digital vernier calipers the total height top to bottom is 82.4mm
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This is the pulley and the two spacer rings - the measure 6.2mm and 6.3mm respectively.

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This is the pulley without spacers - it measures 70.4mm with calipers. (OK the numbers don't exactly add up -the is a slight warp the the pulley so it depends where you measure)

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