No two states are exactly alike, and the best bet is to find out exactly what your state requires - and what you can get away with. My state is stupid easy, and I have seen some goofy things. The year/make/bodystyle is right on the registration sticker, along with the serial number or VIN - so it's easy to notice cars where things don't match exactly. Tourings registered as 4dr sedans, obvious kit cars registered as 193x Fords, in one case I saw what must have been a '73 Trans Am registered as a 1985 Buick on the sticker. Only the 73-up cars use ***les, and getting one when you lose it is a pain in the ****.
Try this site from the Model A collector club (MAFCA) http://www.mafca.com/index.html Choose References on the left side of the page. Later manacoem
Model A Fords made at the Oakville Ford plant in Ontario, Canada (and there were thousands made there) did not have a number stamped on the frame.
to answer your original question..Yes they do. My 28 has them and they can be hard to find but unless the car came from canada..you should have them. I would use the frame number, not the engine number..we all know that engines come and go. It is true that "originally" the engine and frame numbers matched, but in 79 years things can change..Mine had a 1931 engine in it, completely different numbers.
The California gestapo is way over the top. I worked the line at Ford for over 30 years. At times we were so overloaded with work, if the guy sneezed and slowed to wipe his nose, a car never got the number. It was gone. Not until the first Twin Towers bombing did we get serious about numbers, then we were given time to do it right, and it was right after that.