1946-1948 Brake Shoe Position

[CA Victoria]

I have read opposing information for shoe position on the Lockheed brakes. Fortunately there are only two choices.
I had not seen a diagram before today but found one on VanPelts website.
According to the drawing (and some folks Ive read inform that) the primary shoe (front) is the long one and the secondary (back) is the short one.
the other opposing option is the reverse shoe placement.

Can someone help explain the Lockheed shoe movement / reaction. The bottom of the shoes are fixed and rely on more pressure to press into the drum. The larger half of the wheel cylinder is forward.....does the rear shoe move first.....

Checking fit: The 51a-2028 brake cams I have are cad plated steel. They insert over the pin and the shoe fits over the cam without excess play. (I found these to have the correct play, the gap was hidden by the copper kote).