Need help identifying rear end

[vetnat]

Hi. My truck is a Canadian built 1961 GMC half ton. It has a 10 bolt rear end with the number 0707340 stamped on the differential itself. I cannot see a number on the axle tube because there is a bracket on the passenger side covering where I think the numbers would be. This picture is off the internet, but looks identical to the one in my truck. Any help much appreciated.