JimF: 1st,A Big Welcome to The Bolt.
2nd I,m bettin that she,s an early ie low serial# 51 truck that got a 1950 leftover cab(leftside outer cowl vent) when it was built.
Trucks built outside the US could have gotten any hodgepodge that was available at the time.
Regards Steve sr.
P.S. I Vote,like the others, for bringin Her back if at all possible with your resources wink