I take no great joy in proving anybody wrong about a particular subject and I have been wrong myself and appreciate being corrected.. You have to realize that there is some of us who have been doing this for a very long time. I have taken probably over a 100 66/67 A-Body Olds apart. I have always said,you don't learn about these cars by building them,you learn by taking them apart. Being fair about this,you will see parts listings for the BOP rear axle but it's really either a Buick or Pontiac. I suppose they put the O in to show they came in an Olds. Thanks for the info.