Point here -- if PROPERLY done, it CAN work.
Yes, but keep in mind - what you are describing is it being done properly BY THE FACTORY. Ferrari undoubtedly designed its 360 in a way that reinforced the roof edges so that they would compensate for the torsional rigidity that is sacrificed by the loss of the solid panel that connects them. This is exactly what Honda did when it used thicker metal in the door sills and other parts in the NSX-T, to compensate for the loss of rigidity from the top. If you simply cut a sunroof into a '92, with its thinner metal door sills and such, you are not "doing it properly" - not compensating - the way the factory did.
You will also probably make the car significantly more difficult to sell and hence decreasing its market value.
OTOH if all of this is understood, and you decide that you still want to go this route - either because you want to create a show car like the one pictured, or you just (damn well) feel like it- by all means GO FOR IT! And let us know how it turns out.