Hi Jeroen! Thanks for the advice and for staying one step ahead of me.
So what you are saying is forget about trying to convert my 914 to C2 specs. Too bad because I think it would have been a good combination. I paid $177 for all 4 calipers so I would really like to use them. Perhaps the limited applications or expensive conversion process is why they were priced so reasonably. In your opinion, knowing what I paid for the calipers, do you think I would be better off going through with adapting the C2 calipers to my 914 or selling them and going with the conventional upgrade of BMW 320i calipers?