Engines are less stressed than in the contemporary 911, so fewer issues there. Bear in mind that the engine block dimensions, and therefore the cylinder spacing, is the same in the 2.5 litre 986 Boxster and the 3.8 litre 997.1 911.
My 3.7 litre engine started life as a 3.2 litre Boxster S short block.
Engines are less stressed than in the contemporary 911, so fewer issues there. Bear in mind that the engine block dimensions, and therefore the cylinder spacing, is the same in the 2.5 litre 986 Boxster and the 3.8 litre 997.1 911.
My 3.7 litre engine started life as a 3.2 litre Boxster S short block.