I do believe the K Sea Kings had a one piece crankshaft unlike the five piece crank and a dashpot carb like the older ones but with a tickler to unseat the valve which the older ones did not have My 1935 Thor barley runs and starts and the 1939 Sea King is a delite to start and run by comparison
https://youtu.be/Fiqku68yX3U This is a video of the 1935 thor