T4 owners or people in the know

I may be fitting a T4 to my 3dr which is currently running a T34 .48, 803's, MSD evo chip, 500 cooler & 2k rebuilt standard 205 engine.

By fitting greys and the T4 and another set-up at MSD would the whole package work or does it really need to be low comp??

Cams can be fitted and head work to grp A spec isn't a problem either.

Any info would be great