Packard Don wrote:
Packards up to 1950 had a single engine mount at the front below the water pump and a pair on the transmission. As I believe was mentioned earlier in this thread, unfortunately you'll need one from a 1949-1950 as the 1951 does not have the mounts on the sides. The casting has the place for them but they are not drilled or tapped.

As far as I know, Packard made their own transmissions and licensed the overdrive part.