Baba, the second post down on this thread has a link to a bulb conversion chart. I can never get Tim's link to open but if it opens for you then you can cross reference the bulbs and away you go.
https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=829175


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile