Frame differences between C30 and K30 1 ton

[76chevyc30va]

Hello everyone. New member here so please forgive me in advance if I"m asking a question that has already been covered elsewhere. I am trying to confirm that the frame from a 1976 C-30 1 ton cab on chassis is the same as the K-30 1 ton cab on chassis. I know that the front axle changes to the Dana with the 4wd version but i'm asking specifically about the frame because I am trying to track down a snow plow mount that will work on my truck. Most manufacturers list one for the K series but not the C series.

My truck is a 1976 C-30 1 ton dump. Any help or info would be appreciated.

Allen