My brother came across a 12 bolt rear end that the guy claims came out of a '69 Camaro. The casting number he gave me is 1254838 which tells me it may have been in a '69 Camaro, but it was not the correct one. Can someone ID this for me? The only other number he could give me was "GM 21". Thanks, Kevin

And now here's the numbers on the rear end that's in my '69 Camaro. 3969340, GM73 and on the front passenger side of the axle tube the only numbers I can make out is CBP. Is this a rear end out of a '71 Nova made in Pontiac with a 4.10 ratio??

Look here : http://www.camaros.net/years/69/69rearcodes.html and http://www.novaresource.org/axle.htm