I would double check anyway by using the stock pushrod. Mark the tip of the valve with a sharpie then put the pushrod in and the roller rocker on and set the valve lash. Rotate the engine over at least two times, then take it apart. Look at the tip of the valve and you should see where the marker wore off. It the pattern is in the middle of the tip, then you have the correct length. If not then you need a different size pushrod.
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