You shouldn't need to unless the base circle is different than the stock cam. Typically pushrods are cut and replaced with adjustables to same time during a cam swap. Where you are doing a Stage3 you will be popping the heads and rockers and you can just drop the pushrods in.

 

i am going to keep my stock push rods when the time comes for a stage 3 good luck

 

No need to replace pushrods on a HD Stg III or Stg IV M8 kit the stock ones are fine. The problem comes from doing a Stg II as it takes more labor time to reuse the stock pushrods than the cost of new adjustable pushrods when doing the install, but the Stg III and IV require removing the heads anyways so the pushrods come right out at that point.

 

I had mine replaced when I did my stage III but only because I wanted the gloss black covers so I opted for the adjustable pushrods at the same time. It was not a requirement.