I sell and run Denso's mainly for Jap stuff, but I have had no problems with the Cossy applications.
I use the vk20pr-z11 as should the 4x4 saff's
T34 should run svk20r-z8
2wd saff are ik24
rs500 are ik27
3dr are ik22

With no cat on the car different plugs need to speak to your tuner.
Sometimes it is important to change the heat range when running higher boost etc, i.e. use a colder plug i.e. go from vk20pr-z11 to vk22pr-z11, or from a ik22 to a ik24 etc etc
Escort turbo runs ik24 and tuned ik27.