Thanks for the info. Don't have the casting numbers yet but the serial number ends in F55N, with one source indicating this would be from a 6000 series truck.
Matthew 6:33
1952 Chevy 1/2-ton 3100 Late '55 235/SM420/torque tube 3.55 Dalton Highway survivor (using original 216) www.truckwithaheart.com