Seeing a slight coolant leak at the right rear cylinder to crankcase boss. Its the cylinder not the gasket. Looks like coolant is seeping from the aluminum. Like its got a crack or porous.

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If the crack is at the intersection of the right rear base nut surface and the vertical surface of the casting, it is not  coolant but the oily crankcase mixture.  There are not any coolant passage ways in the lower right rear corner of the cylinder.  This is the common area where the cylinders break due to high mileage or the stress of modified engines.  This is the problematic area most of us refer to as "fixing the ears" to repair cracks or prevent cracks.