The main one is the alternator and I know the owner originally fitted the correct style dynamo with a cable drive to one of the gauges, presumably the tacho.
I would be surprised if the mirror wasn't correct, but I don't have the degree of knowledge to convincingly argue either perspective I'm afraid.
Knowing the owner as I do, I would bet that any minor deviations from original spec were made knowingly and intentionally for a specific reason.
The owner participates in numerous long-distance continental tours in his cars and presumably made a small number of minor practical concessions in that regard. However, I believe one of the reasons for the sale is that to make it a viable vehicle for these kinds of tours would require further concessions that he wasn't prepared to make. It was never going to be a trailer-Queen, so it had to be suitable for its intended use within the confines of his "originality" mission.
If you really know your stuff, you can clearly pick out small details that aren't technically original, but could you in all honesty, say that it isn't a genuine Cobra from the pictures? How many other 289 Cobra replicas have been assembled to this level of detail? There can't be many, if any. And in my view, that makes it a very special car and whoever buys it will have been very fortunate that this car was available at the time they were looking to buy.
Paul