BX axle code?

[JRSully]

The 69 L78 Nova that I sold had a BW (4:56) coded rear in it, looked to be dead original to the car, never out (posi unit and gears replaced)and was date coded perfectly to the car (casting date on rear and assembly date stamp)Was it originally ordered that way.? who knows, original owner's son said his father ordered it that way, gears ended up being too hairy for the street and changed the guts out to 3:73, all of those components were dated late 70 as I recall, have pics somewhere if anybody interested