The lines held 350psi of Argon for 24+ hours, no leaks. So tonight I vacuumed out the lines and released the refrigerant into the system. The compressor comes pre-charged so once everything is hooked up and ready, you just open the valves on the outdoor unit and you’re ready to run.
The system runs in cooling and heating modes, both were tested and work. GREAT SUCCESS.
Now I can finish skinning the walls. Hurray!