Don't stress to much over the sim. They know you don't have any turbine experience, let alone experience in the 73, so they aren't expecting you to fly it like you got 5000 hours in the thing. What they are probably looking for is basic handling techniques, crew resource mgmt skills, and how you deal with emergencies. They will more than likely have a company pilot (or the interviewer) in the other seat flying with you. USE THAT PERSON FOR EVERYTHING!!!!! In a crew airplane, the flying pilot flies. He/she does nothing else. So, act as the PIC and tell the other pilot what you want....i.e.- bug speeds, headings, and altitudes. Call out minimums, rollout for steep turns, etc. Use the other pilot! When an emergency happens, fly the airplane! Remember aviate, navigate, communicate. You aviate, you and the other pilot both help navigate, and let him communicate. Dictate what you want done. Call for the emergency checklist and the other pilot will run it. You just fly the airplane. Since you have no jet experience, keep your instrument scan up and try to stay ahead of the airplane. Don't let "ATC" rush you into anything you're not ready for (i.e.- Single-engine ILS down to mins). If you need more time, request a box pattern. You should've declared an emergency when the shat hit the fan so ATC is all yours. Use them. More than likely, they will brief you on the basic autopilot functions and how to use them (that is if they let you use it) and also some other basic stuff. Again, they know you don't have jet experience, so the aren't expecting perfection.
Most importantly, they wouldn't interview you unless they were interested and thought you could get through it. Just do your best and you'll be fine. Good luck!!