oh no, is this 8.75 housing too bad?

Old Caddy mechanic (like late 40's to 80's said they would factor in a 1/2-1 degree of + toe inr into the rears when they built them for track duty. Something about stability but I never bought it. That needs to be cut and corrected, and knock about 4" off each side :-)
You can buy ends, but before you cut it, the tubes might be the thing that is off and they might have corrected the track with the offset end. You would have to send a 60" shaft through the mounted carrier (or some C-body axles) and see where it ends up in relation to the ends, might be spot on.