Drop in Motor first, or Steering box first?

I have done a lot of disassembly on this car, and made some modifications, but now its time to get the major components installed. This will be my first time re assembling an A body. I know its basic advice, but is it easier to install the manual steering box then the 360? Or should I set the motor in first? Gotta do this by myself, so Im just looking for whats most manageable/accessible.
Thanks