Engine overtemp,
Let me put it this way. I do not think you have take any more writtens, than vice versa. Further, as far as I know, there is not a requirement, to take the flight test in an a/c you have to be typed in. In other words, provided you took the test in a Seneca, or something similar, you would be issued an ATP. Of course, if you wanted a typerating, you would probably have to take a test in what you wanted to be typed in. As I am sure you know, the cutoff for types in the US is 12.500lbs.
If you did not have 3000 hrs, which is the CAA cutoff, I still do not think, the FAA would require 14 written test.
However, I simply asked a question, hopefully, this wil not degenerate into the typical CAA-FAA debate.