Hey bigbolt, Don't know exactly what you might have there. Those No.'s aren't "jiving". If it's a '54 6400 series, it will have a 161"in. wheelbase, & be 16000lb. gvw. What's confusing about yours, is the ID plate giving a 4100 ID number, with 16000gvw stamped on it. If it's a 4100 it should have a gvw of 14000lbs., & wheelbase of 137"in. It's possible someone switched the emblems, or the hood is from a 6400, but that ID plate having 16000, on it puzzles me.