Chris Herrel at Boos-Herrel. http://www.boos-herrel.com
He is the expert when it comes to 36-48 Lincolns and has always been good to me. He has master cylinders listed in his catalog online.
How was the brake application before the master cylinder was replaced and when the old master cylinder was still working? The brakes on my Continental start applying within the first 1/3 of pedal travel. If the brakes were working fine when the old master cylinder was still functional, I would suspect the new master cylinder's function.
Like TexRiv_63 said about his 1934 Packard, Lincoln originally had molded rubber bumpers for the hood corners. They were missing on my 1937 Lincoln K, but the mounting studs were still on the inside corners of the hood. I purchased a nice reproduction set on Ebay and my hood never falls anymore. Ray Theriault may still have a set or two of these hood bumpers.
This is one of the fabrics offered by Packard in 1955 from an original dealer's upholstery book. Looks pretty close to the upholstery in this car if not an exact match. I like it a lot.
The original poster asked about four wheel brakes on a 1922 Hispano-Suiza. The 1919 Hispano-Suiza HB6 came out with four wheel brakes and with a mechanical servo assist no less!
Here is a nice 1916 Winton in the Harvey G. Harper collection in Eureka, CA. They had it out last year for the Rhododendron parade, so I know it runs. Not sure I like the color scheme, but a beautiful car just the same.
My 1930 Lincoln has a self winding electrically actuated clock in the dash and a manually stem wound clock in the rear compartment. The best of both worlds.