Help Build date junkies. Build date difference between car and transmission

They didnt stamp vin partials in the components or the body shell until 1969. Starting in 1969 that was done for theft recovery purposes. Before that, all you have was a sequence number on the body shell that did not match a vin. The trans and engine build dates being prior to to the car build date are pretty normal. Cant imagine as a 67 it's got the body vin stamped on it.