Does any know if the the Pitman arm for the 1/2 and 3/4 ton 1950 Chevy truck are the same?

The casting numbers are the same up until the numbers after the letters "GM" not sure if they that means a different part or if those last 2 numbers are just identifiers. Evrything else looks the same in the picture (I am comparing my part to a picture of a part and wanted to know before I bought it - thanks


1953 3100