Try this B727 performance link:
http://edusapco-va.weebly.com/uploads/8/9/7/6/8976510/727200performance.pdf

You have to adjust EPR  +/-  0.20  in order to get near the estimated take-off distance.

Also, there was a "CAPTSIM 727 flight model mod 1.0" zip file available on some website.  In that file was EPR correction.  Suggest doing a browser search for that file.

I also provided a link to my dropbox for download:
https://www.dropbox.com/scl/fi/ger1vrj9bfr17umvt38ai/CAPTSIM-727-flight-model-mod-1.0-FSX.zip?rlkey=yvkictypsip7vp8j9107xtg4r&dl=0

It took me 3 years to stumble across your request.
Here's some other interesting B727 websites:

http://edusapco-va.weebly.com/uploads/8/9/7/6/8976510/727200performance.pdf

Some good manuels
https://www.scribd.com/document/420076913/727-200-QRH

Good to know
https://www.flightsim.com/vbfs/showthread.php?151131-727-Performance-Tables


Mr. LL