I have a '70 Chevelle with an unknown rear end (10-bolt posi), and I was wondering where the best place would be to go to figure out exactly what it came out of? The 7-digit number I grabbed off it is: 1407542. It also had "GM1" and "1233" stamped on it. Is there a listing anywhere on the net that I might be able to decode this at? Thanks.

Try this website http://www.prestage.com/cars/RearEnds.asp
Happy hunting graemlins/beers.gif