Is there a place to find a parts diagram and part number? Illustrated would be good as some of the names I call parts are not what they were called back then or I just have no idea what to call them. Like the pipe between the 2 radiator hoses, what we used to call a thermostat outlet is a cylinder head upper water outlet. I have a 1926 and the 26-27 seems to be a little different than other years.
The Macs catalog has great drawings and now Langs, Snyder's and Chaffins have pictures in their catalogs. Martin Is preparing beautiful line drawings of all parts, I believe for a future Langs catalog and many have been on this forum. Also the Parts Lists have pictures and many are available on this site in the Encyclopedia and on the DVD available from Barbara McCalley.
1926 Model T's had two different type cylinder head water outlets with fan bearing support/adjustor. The early cars had a screw eccentric type for fan belt adjustment which was soon discontinued and replaced with a cam type eccentric adjustment.
There were also two different length fan hubs depending upon use of a two or three tube radiator core.
Get a catalog(s) from one of the suppliers, they are free and they want you to buy parts from them. Cylinder head (water) outlet 1926-1927 #3004-E (with fan) or (radiator, outlet) connection pipe #3939. Some dealers use the Ford parts numbering system some don't or some change it just a little. The catalogs have very good illustrations in them. Find the parts you need and order by their number.
I used to recommend Mac's catalogue (only for the pictures ); now I think the best illustrations are here: http://chaffinsgarage.com/catalog.pdf
A bonus is that Glen mostly uses the Ford part numbers.
Martin's drawings in Lang's catalogue are great for showing how things go together.
That helped a lot. Have a parts order ready to go.
I have notices that the front and rear fender bolts and nut listed as kits seem to stop at 1925 is there a lot of difference in the 26-27 fender bolts?
I have a CD labeled,Model T Ford Comprehensive Parts Book, (c) Bruce W. McCalley and the bottom note reads, Every part, picture and change listed in 67 Ford Parts Lists from 1909 to late 1927, plus thousands of Factory Numbers and descriptions in both numerical and alphabetical order, in the Adobe Acrobat Format.
I'm not sure where or when I got this CD, but it may be still available, most likely from the MTFCA, as Bruce was a founding member.
Purchase a parts book for the year of your car.