US 54 runs right into Wichita. Why not stay on it? 54 isn't a bad road at all. Lots of 2 lane but truckers run it all the time. End of March shouldn't be too much of a worry about the weather.
Don't know about 400 though.
2010 Cruiser CF30SK Patriot
2016 3500 Duramax
1950 Right Hand Seat GPS (she tells me where to go)