You can either change the receptacles to 6-15 p...240v @208/480 or change the cord ends with the correct nema 6-15 r...120-240v and probably still change the receptacles to match...why not just hardwire it in a 1900 -j- box...
It is easy though...just like putting a new end on an extension cord...
All electrical work is easy....just shut off that circuit first before you work on it.