E brake question

[billcocarb]

Looking at a 57, 3100, swb, 235, 4 speed and it has the e brake system with the handle to the right of the shifter with the brake at the rear or the trans. In everything I can find it shows the 1/2 and 3/4 to have the handle on the left of steering column and rear shoes being the e-brake. It shows the trans brake being used on 1 ton and up. My question is : is it possible a 1/2 ton came of the line with the trans brake or is this something I should stay away from. Thanks in advance. Tried searching this but didn't come up with anything.