A few months back I read a post where somebody said that they had a new old stock steering gear case that they were willing to part with. If that's you, please send me a private message.
Stephen, make sure it the right one for your year car. the 26-27 were different than the 1917-25 cases, and of course, the brass era cars were different.
The 26-27 cases were the same ,only the guts are different,
For my 26-27 project I am about to assemble a complete steering column (5to1)with parts from different sources among which is a NOS Steering
gear case, according to my parts list part no. 3507 for all years 09-27.
This is not concordant with above information.
How can I determine if my part fits my project?
There were lots of changes to the steering gear case over the years: http://www.mtfca.com/encyclo/S-T.htm#sgc
You can use your NOS steering gear case on your '26/'27 if the case was made after october 28 1921 when they added thickness to the bottom and milled a slot for a steering stop.
One of the planetary gears has a longer pin that is supposed to go in the slot. In the link several versions of the milling of the slot is described. I'm not sure if an earlier version slot affects the limits of the steering angle so much it causes any problems? I know the proper length of the drag link is important, maybe more so. There are several variations: http://www.mtfca.com/discus/messages/257047/300409.html
To Royces list we have to add the drop frame version of the drag link - I'm not sure if there was a special length of that link for 26/27 though.
My mistake, Jack. I figured that a different ratio of gears would demand a different case, but I should have known as Ford made the 10 and 11 tooth pinion work with the same ring gear,