[Hacksaw]

My buddy just bought a 71 Camaro that is 90% restored. It has been setting for awhile but has a new engine, transmission, etc. the power steering doesn't work. He changed the pump with a new one but it still is hard to turn. It's like it is just not getting fluid through the gear box. He jacked it up and turned it lock to lock for 30 min trying to get air out, but acts like its just not responding. Could the gear box have an obstruction? I've never had to deal with this problem before. Thanks