Overhauling the valve train? If the answer is yes, then renewing all the wear and potential wear components at the same time will attain the best results.
Interfacing old, worn parts with new will lead to premature wear of the new parts and compromise long term durability, performance and, ultimately, reliability.
Other components to aid you with a successful valve train overhaul:
Renew all the potential wear components for best results and ensure you have ordered the correct amount of valve-springs, valves and fasteners. Don't forget to order all the new gaskets, seals and gasket sealant (08C70K0234M) you will require.