Just in case anyone has one kicking around, and for future reference. The axles that I’m interested in are on volvo 240s of the following flavours:
1976-79 240 with B21 and any transmission: 3.91:1 type 1030
1980 240’s with B21A/F and M45/6: 3.91:1 type 1030
1980 240’s with B21F and A/BW55: 3.73:1 type 1030
1981 240’s with B21F non-MPG: 3.73:1 type 1030
1981-82 240’s with B21F-MPG and AW55/70: 3.91:1 type 1030
(Courtesy of: here)