Gutsha,

some additional comments..on the steering gear box, the number you showed is the casting number on the side. The number is stamped on the flat portion on top of box just behind the filler cap...take some steel wool and rub. the number should be exposed.

In addtion, it appears someone has added some type of shock system to the front and i'm assuming the rear..The correct system would be the Watson Stabilator also used on the 4th. It was a cylindical box with a strap which attached to an eye bolt type bracket on the front axle. The stabilator itself was attached to the frame slightly ahead of the front axle. You can prob see the three mounting holes in the frame series. In 29 they went to an arm type shock system.

I notice the rear bumper is a split type..i'll have to do some investigating on that one as the ones on my cars are the unbroken straight type all the way across.

In addition, originally the spare lock was the dog bone type
eventuallly they went to the Oakes style flush lock as a theft deterant.

but regardless of all the info. It appears you have a very nice solid sedan.