Hey Al
The power steering box will work , you will need different mounts for the pump or a total different pump & mounts , we have spent almost a wekk trying to locate a matched set of pulleys & mounts for the power steering on a Chall I`m working on
The booster is a problem , the Hemi used a special booster & mount to raise the booster up , you will need the smaller diameter booster just to clear the larger valve covers that the Hemi has ,or the easier route is to stay with manual brakes even with the disc brakes , the feel is good with manual disc brakes & I highly recommend using discs with the Hemi