We are all assuming quite a bit.............We don't know what brakes Slow..Rider has on his truck.
'51 is a "crossover" year, last year of Huck's, first year of Bendix-type brakes (I am referring to front axle only, 1/2 ton up to 2 ton.)
Beyond that, I have no other knowledge to impart.
So Ron, what kinda brakes you got on the front of that '51 1/2 ton ??