A lot of the production 1960 and 1970 B body cars I've measured the crankshaft on look like they are closer to 1 3/4 to 2 1/4 inches to the passenger side scope
The engine and driveline torque rotate to the passenger side clockwise (looking from the front of the engine to the rear of the cars) but the engine rotation puts more pressure on the left rear tire than the right rear tire, it is trying to lift the right rear tire up instead of pushing it down whiney Hence the driver side axle breaking sooner and more often than the passenger side. Same thing on breaking the driver side carrier caps on rear ends work scope

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)