Think it's around 58:42 front:rear for the GTR and only slightly better for the GT-T, maybe 57:43 - because the front wheels are not driven.
Point is, they are nose heavy because of the long 6 made from an iron block.
I have no idea for the 4-door. I would actually say it would a little be better because more weight added to the rear (doors, etc), however base does remain the same.