Once you get the correct cables from LMC, you will see exactly why those other cables won’t work.
Also I am wondering whether anyone has a better description of the proper adjust of the eccentric bolt for the parking brake. The description in my manual just isn't that clear. It sounds to me like the shoe just needs to have no pressure on it from the lever when the parking brake is not engaged. Maybe that simple?
In the shop manual for a ‘50 1/2 ton, it basically says while the brake is released, loosen the lock nut on the clevis, remove the cotter pin from the clevis pin, pull the slack out of the cable, turn the clevis until the pin lines up with the lever, then install the pin and the cotter pin. Here is a link to that section of the
Shop Manual