I couldnt access my mk2 due to its trcky hiding spot....but... i have pics of my mk1 Escort chair mountings, mine are from a Mistabishty L300 van, identical to Cordia '84-'88 seats , i owned a Cordia GSR Turbo back in '93-'98 which is where i got the idea from.
Pics aren't great but give you an idea...
I reduced the pics 50%....still huge , lol

This is the rear inner mount, prolly the easiest to do.


If you remove the Cordia runners you also remove part of the mechanisms that do the flip forward & slide, not good! Best to modify car to suit Codia runners, you know they work well so why mess about tacking on 'old' Escort tracks. best bit is you also sit about 2in lower in the car

M.