Hot Rods Flathead 6 identification help

So I finally got started working on my '42 Power Wagon. But no surprisingly things have been changed on it over the last 70+ years. Was originally an open cab but is now a closed cab, 12 volt system now etc.

I'm trying to run the engine id number but can't seem to find it, I'm thinking it a reman. block, but wondering if anyone can confirm. The block number on the raised area on the left side of the engine number is N3067960C

 

Dodge Truck VIN Decoder at http://t137.com/registry/help/decode.php
says its from a 1961-62 M37B1

 

Thanks 56C3B6, but I tried it and says invalid and states
Invalid Serial Number: N3067960C
Error Code: PRE49
The prefix of N306 is invalid for a 9 digit serial number.

 

Ahh.. you are correct my mistake‍.

 

Are you sure that isn't IND 30----------- http://www.t137.com/registry/help/otherengines/indengines.php