Safelights other than a very very dim green, and then for short times are still not good for pan films.
As far as the filter for the effect, if I recall correctly, Ansel Adams recommended the 44A to simulate the old ortho film look and feel with most pan films and the 47 for blue only in his book The Negative. It would seem, at least to me, that his recommendation would be valid. Even though the sensitivity to red exists, if the light doesn't, then nothing would be recorded where it was red. As the red sensitizing is accomplished by adding an agent to the emulsion, the grains remain unchanged either way. At least, that's my understanding.
I apologize if I'm misleading anyone, and if I'm wrong, I hope that someone can set me straight.