1947-50 Kaiser and Frazer, 1951 Frazer and all Henry J used an 11" Trico Triple Action rigid frame blade, part numbers TAU-11 or WLA-778-11C, the former being much easier to find. All 1951-1955 Kaiser full size cars and Darrin used the Trico RB-11 blade. The difference between the blades is that the RB-11 has a flexible frame for the curved windshield while the others have a rigid frame for use with flat glass.
The RB-11 can be used universally but experience has shown the rigid frame blades give better performance on flat glass. The attached photo illustrates the difference in frame design. Ignore the length.
The other photo illustrates the arm needed. It's 11" in length and should have the end angled as shown.