Sounds like replacing the alternator in an 03 Cobra... they are bolted to the engine, under the driver's side, 4 valve head and then the engine is put into the car.
You have to removed a bunch of stuff, but it can be done, without moving the engine.
Even worse is the inner serpentine belt, for the water pump, power steering pump and AC compressor, it is behind the belt for the supercharger & alternator and the pulley for that is caged and a bi?ch to remove.
Will have to look into replacing that one day, but, hey it has worked for 16 years
-Brian