flew the 500 model (wet) from 79 until 83.
As others have said, built like a tank, used to hate 727s and DC-9s passing us. Loved the instant spool-up but it could have used a little more power on hot days.
We used to operate them from GCM to IAH, MIA, TPA, KIN etc. did the training in a 400 SIM at Allegheny/US Air in PIT