I always heard students saying that a 100% neuro / div40 internship was required to get a neuro post doc, but I've seen numerous folks (100% of those who have tried) go from a generalist internship to a neuro postdoc at extremely well reputed places. I'm sure it was the neuro research and previous training experiences along the way that made them stand out, as well as neuro tracks in internship to solidify that training. My point is that, from an outsiders perspective, it seems there may be several ways to that skin the cat so long as (1) neuro clinical experience and (2) neuro-related research are developed.
I'm not sure if my perspective has been full of outliers or not- I'm curious what the neuro folks say.