I remember the kit, back in the early 90's, it was very beautiful.
It looks like it has many stealth features :
-Total absence of cylindrical parts,
-Flat surfaces
-Canted verticals
-rectangulal engine gas exhausts, that not protrude the fuselage (if i remember well in the model, the surface behind the engines was movable (up down) like a beaver tail acting as an aerodynamic surface
-over the fuselage inlets
-rotary weapons bay
and some good aerodynamic ideas
-Folded down wing tips (Valkyrie style)
-Beaver tail
Looks to me like a bag full of good tricks, apart from the upper fuselage inlets, which in a real world, at high angles of attack they would suck vortexes instead of undisturbed air thus make the engine to stall.
For sure this configuration with inlets on the upper side, is ve