| if the pin to deck height is different i'd say you have pistons for a 916. they are the same diameter and very close to the 888 ones but for the pin/deck height. as the others have said, the best way to fix the leak is block off the oilway with a grub screw and be done with it. note that i only know this after scouring the globe for some hi-comp 888 pistons and everyone only having 916 ones. ferracci had the 888 ones (wiseco) and i was very keen to measure them up when they got here to make sure i hadn't been sent the "wrong ones".
paul. | 
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