This Piston should be renewed along with the other components that make up this assembly including Piston rings, gudgeon pin and the gudgeon pin retention circlips - all pretty much essential when rebuilding the engine.
Interfacing new parts with old will cause the new parts to wear prematurely and lead to a less than satisfactory outcome - this superb engine deserves only the very best!
Where possible always try and renew the complete assembly. Interfacing old parts with new rarely has a happy outcome!