Projects 3 bolt to 2 bolt distributor adaptor

Does anyone have any picture of the adaptor changing from a helmet to a crab with a mechanical fan? I was wanting to change out the distributor and fan setup on a roadster I'm building with a 1937 flathead. I know it will depend on the cam for the adapter. I'm not sure of the clearance with the fan. I'm wanting to use the fan setup instead of the generator mounted fan.
Thanks

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