that plate isn't factory, and the engine number is likely a rebuilders number, no telling what it's been thru in nearly 70 years .... the 41 to 46 trucks are very similar, not much change after 42 until the 47 Advance Design model came out .... without a title, you're left being a detective -
this site might yield some clues for dating it .... and 1/2T's have 6 bolt wheels, larger trucks have 8 bolt
Bill