Hi mate,
A very interesting plane, particularly the French version that we call "T-28" but this version has quite nothing to do with any American version. Officially, it was Sud-Aviation "Fennec" (. This French version is, in reality, a T-28A fuselage with a new engine (Wright R-1820-86 Cyclone). And it's after the "Fennec" that Americans mounted this engine to obtain the new T-28D.
The French "Fennec" is sometime called T-28F (F for France) or T-28S (S for Sud-Aviation), but that is absolutely not official.
The "Fennec" has no ventral dive-brake (as the T-28A). Some have a slightly higher canopy.
Jicehem