Anchor Bolt at concrete base for 26FT tall light pole

We have an old light pole which is 26FT tall. The anchor bolt is rusty and broken. The existing concrete light pole base is 24" diameter. The existing anchor bolt is 36" long. We would like to install new light pole and new anchor bolts. But, we would like to reuse the existing concrete light pole base if possible. What information I need to provide in order the correct material and size the proper anchor bolt for my new light pole. Will the installation of new anchor pole damage the existing concrete pole base.