Mixed 1PS and 2 Pipe Vented in Philly

Hi all, I have a client in Philadelphia who is seeking a plumber with steam system expertise to advise on adding a new radiator to her system. She has a house full of primarily two pipe vented radiators, and 2 one pipe steam radiators. As part of her kitchen renovation she wants to move one of the radiators ~5 feet away from the existing pipework, but she isn't sure if she should keep this unit as a one pipe steam radiator or install it as a two pipe vented unit to match the rest of her home. She indicates that all of her radiators have been functioning properly in past heating seasons.

If you are in the Philadelphia area and able to help my client with this project, I'd love to pass on your name/company to the client! Thanks so much :)