I have sucessfully developed Kodachrome 64 i Caffenol, developed like C41, i.e. ca 16 minutes 20 Centigrade, the recipe was Caffenol CM, and remjet was removed just by putting the finished, washed film in a bath of diluted detergent, using two wetted fingers.
The result was fairly low contrast, thin-ish, but could no doubt have been improved by sucessive tests.
However the results was not such that I would start buying outdated Kodachrome, neither for B/W nor the vain hope that anyone can some time in the future resurrect the K-14 process........ in my book there is no room for slide film anymore, since even most film workers use a scanner these days and put their images on-screen that way.....