Steering column, 1975 Valiant to 1979 Duster?

I had a customer walk in to work today looking for a steering column for a 79 Duster, and I mentioned to him I have an earlier model (75) Valiant with one that might fit. I was wondering if any members here know for sure if the column is the same, before I begin pulling my column. They are both 3 speed auto column shift. Thanks in advance for any advice