So far here's what I think we know about your truck...please correct me if I'm wrong.
You have a 1/2 ton 1946 or 47 truck.
You have a 1946 cowl tag from a 3/4 ton truck (based on it's s/n).
You have a 1946 engine from a 3/4 or 1 ton truck (based on it's s/n).
You have a 1947 3/4 ton Title with the 1946 3/4 ton engine serial number on it. (My .02 cents...with a March build date on the cowl tag it's hard to believe it wasn't titled until 1947, but stranger things have happened).
The only other items that might indicate it's either a 1946 or 47 would be the date codes on the trans, rear, radiator and maybe the speedometer assembly. I'm not aware of any other parts having a date code on it...
Mike B

Mike,
Close, but it’s actually not quite that complicated.
The AZ title was solely based on the engine serial number, yet stated 1947. The title did not specify model or 1/2 or 3/4 ton.
The cowl tag simply reflects the engine serial number.
Based on everything we discussed we determined that it is 100% a 1/2 ton truck as it was described to me and sold to by the seller.
Side note: when I registered the truck in MD, I was able to add DP as the model!!
Your last paragraph is exactly what I was looking for to further determine if the truck is a 46 or 47. You are saying that there are date codes on the transmission, rear differential, radiator and maybe speedometer, so I will check those.
Thanks for everyone’s help. I’m all set.
Andy