Hy Chris Mckenna, welcome, your pictures show the typical "pull type" linkage of the heavier trucks of the era. I'm sure we could come up with a dual master cylinder setup that would work, but I do not think there is sufficient room there for a booster. If you were to move the pivot point arm farther to the rear of the chassis and extend the pull rod to reach it I'm pretty sure you could install a boosted dual master cylinder system there, hope that helps.