I haven't seen a bench seat with the column shift instrument cluster in a 73 or 74 Grand Am. But, I have seen it in a 75 GA. Pics below. This one has 60/40 seats too. I also have pics of column shift, bench seat 75-77 Grand Prix's, and even 77 Can Ams, which also use that cluster of course. The cluster you are showing is from a 75-77, since it says Unleaded Fuel Only on the gas gauge, and has the blue kilometer per hour (kph) printed on the speedometer inside of the mph, both of which started in 75.
I personally like a column shift and 60/40 bench seat best, and might convert my 73 GA to them, so that's why I've collected pictures of them.
18238884_835271206611077_956699053474733761_o by
grand73am, on Flickr
18216621_835271366611061_4844239508633330270_o by
grand73am, on Flickr