Michael,
Not sure about this, being a Texas transplant, and have had my share of pecan pies; but am always open to new ideas.
My initial thought was "why bbq rub in a pecan pie?" but let me do a little research with the family recipe and see what I can come up with.
Of course it wouldn't hurt if I stopped in Badbobs to check it out, which I will do soon.
I am sure some other folks will chime in shortly.