Hello everyone, My 68 Skylark has a 8.2" axle with a 2 series carrier. I would like to go with 3 series gears. would the spacer for 3 series gears be the same for any GM carrier? In Summit they advertise a BOP spacer for this purpose. However, I have been told that BOP does not necessarily mean it is for a Buick when dealing with rings and pinions. Does anyone know if this spacer would work? I realize theat a posi would be a better option, but that can come later. Thanks for your replies.