I have several photos of Lee tanks in Burma but none of Grants. The Lees appear to be A1 and A2 models (short 75mm with riveted hulls) and they all lack the machinegun cupola on the turret. Take that back...one in one photo has a cupola. They all appear to be typical US Olive Drab or the British equivalent (can't tell for sure from the pictures of course) but are solid color over all.
All appear to have the smooth rubber block style tracks.
Some have very large white stars on the hull sides just ahead of the doors. All appear to have the solid road wheels rather than the spoked type. The vehicle serial appears in what looks like yellow at the back end of the hull on each side (a "T" with the serial following).
In two photos what looks like a dual standard British style smoke discharger has been added to the turret side on the port side of the tank.

You might also see if you can find a copy of the regimental history of the 3rd Carabiniers written by L. Col. L B Oatts.

The units I know had Lees include: 3rd Carabiniers (Pow's Dragoon Guards) and the 254th Indian Tank Bde less 7th Indian Cavarly in Stuarts.