So what year is this spare steering box that I have ? A 1942 ? The numbers appear to be 21A 3559 D . I'm trying to rebuild one for my 36.
Well, the Green Book listing is interesting. 3559 is listed as a shim. The housing is listed as 21A 3548-A and is common for 37 thru 1948.
Don't see a 3550 and 3558 is a stabilizer insulator.
I have lots of early Ford steering box parts, so PM me if you need anything specific.
Neal
Are you looking for the housing or the housing mount? The housings are readily available, it's the mount that's not reproduced.