I've completed a modified flight model for the Captain Sim 727-200.  This will give you realistic EPR values, realistic descent, accurate fuel consumption and allows you to set power for take-off, climb and cruise using real world power tables.  I have tried as well to get pitch attitudes exactly right for all modes of flight.  JT8D-9 engines are modeled. The link to download is as follows:

http://www.mediafire.com/file/5xjxa2bf87ie6tl/727%20200%20flight%20model%20mod%201.0.zip

One thing I forgot to put in the readme: on final approach, use fuel flow to set power.  Fuel flow with 30' flaps should be about 3300 lbs per hour on each engine at typical landing weights.