Hi Heikki,
These are what a 1934 Ford wire wheel take. If you buy the wheels you could ask for the measurement where the hup cap goes just to be sure.
RW Johnson sells some:
http://www.teardroptrailers.net/parts/wheels/wheels.htm
This is the company, C&G Early Ford Parts, where I bought them from and bought the tail lights as well. They are in the San Diego area and their business is replicas of old Ford parts.
http://www.parts123.com/parts123/yb.dll?parta~partsort
If you look in my album, you can see the parts I bought. There are a variety of choices based on 3 designs: plain center, Ford and V8 as the 1932- 1935 should be all the same size.
This picture is from a catalog page from C&G early Ford parts, so you can see the variety of choices and decide which you like best.

The plain ones aren't shown in the picture but you can see them at the RW Johnson site.
Have fun dreaming up what you want to do.
Martha
