You could purchase a repro Vin plate from companies like Filling Station and stamp the number from your title on it. The first two letters should be LQ. Look at web page . home.znet.com/c1937/ID.htm . for more details. The numbers use an 1/8" stamp.

I don't know about the 1929 but, when I replaced the painted over data plate on my 38, I discovered the stamps are an odd size. I bought 1/8 and 3/16 stamps. Neither was an exact match size wise. Also two different sizes were used on my 38. Witness the image of my original plate below. The 5HB05 is larger than the sequence number. I used the 3/16 stamps for the 5HB05 and the 1/8 for the sequence number on my replacement. Since attaching my own data plate is technically illegal, I keep my OEM plate in the glove box just in case.

Now to your "VIN". Most states used the engine number on the title prior to 1955. Some used the number on the data plate. What number is showing on your title as the VIN? If it's the engine number AND your truck still has the original engine, you'll find that number stamped on the engine close to the distributor (that's where it is on the 38, I'm assuming the 29 is similar). If the VIN on your title is the engine number and the original engine is no longer with the truck, you'll need to contact your state licensing authority and ask them what you need to do to get it titled. This is a common issue so all states have a process to resolve the problem. If your VIN is the unit serial number on the data plate all you need to do is stamp it and attach it. It would be wise to contact your state licensing authority and ask them if they accept your reproduction plate of if they need to issue an "official" plate.