Power Steering Box 73 Dart

Guys,
Looking for a good power steering box for a 73 dart. Quick question and that is it is a 73 Dart and I am planning to run a Big Block (If it makes a difference I am running fender well headers) and would like to retain the power steering. I have read that it is not a problem and I have read that it is. Having built only Chevy for the last 30 years I could use some good advice and if I have to stay manual I will.