To answer this it needs a top rabbi and dayan who is also a Kahanist, or sympathetic to. No doubt they would be stricter than eg R.Druckman,
of the last conversion "scandal"
http://www.ynetnews.com/articles/0,7340,L-3405573,00.htmlwho although having a big knitted kippa and a big beard, is
very, very far from Kahanism.
R.David Bar Chaim would have something daring to say, but he probably wouldn't be "mainstream" enough.
What are the names of the former Israeli and Anglo Kahane Chai/Kach rabbis in Israel?
Are there any of them left, even?