It should be fine, however do NOT change the rated alternator fuse. Damage to your vehicle may result. The fuse is sized to every component between it and the next fuses. Should a problem occur in the PDC the extra 100Amps of draw from the factory 150A fuse could cause problems.
Instead, Should you have a high powered load you want to use, attach it straight to the battery or alternator charging output. The point of a 200A alternator over a standard 130/150A alternator, is for plows, or large amplifiers that would otherwise increase charging time to unsatisfactory levels. Charging is not controlled by the current rating of the alternator, but instead by output voltage.
A heavier duty alternator will produce a more stable voltage across the load range than a light duty alternator. Likewise, at 150A draw, a 200A rated alternator will output a higher voltage than a 150A rated alternator.
The cable is sufficient for this purpose, however since its fine stranded wire, make absolutely sure that you seal the wire crimps on the end and ensure than you prevent as much abrasion as possible on the wire casing. As capillary action will pull water a long distance through the wire and cause serious rust damage.
Otherwise, good luck.