There is a truck I have found for sale being listed as a 1947 AD. I have been wanting one of these trucks for a few years. I have learned a few things about how to i d them from a 48 and newer. Mainly being that the firewall does not have all the impressions on it and at the top of the firewall the recess for water to run down the sides is not present on a 47. I have always thought that a 47 was a 3 speed floor shift model. This truck I am looking at has a column shift lever on it. I have yet to talk to the seller to verify my questions about the truck so in my frantic wait I figured I would post up my question as to when did the column shift start for the AD trucks? Maybe you will save me some stress and find out that this is not a 1947 but a later truck. Thanks.