I am planning a build putting a 455 into a 1977 Regal. It has of course a 10 bolt with 3.08 gears. This will be a street car, but I want to be able to romp on it without worrying about the rear axle blowing apart. I am looking to see if there is a 12 bolt that would be an easy bolt in swap. I don't want to do any cutting or frame modifications.
Thanks for the help.