My friend with car no. 1299 has a bad ball joint as well. He purchased the Saab ball joint and it is not correct. The Saab ball joints for all 900 series cars, which would have been the model that was new in the 1980s, are all the same, regardless of the year. The holes where the ball joint bolts to the a arms do not line up with the Saab part. There is also no part number or manufacturer's name on the AC ball joint. Hopefully we can identify the part so as to avoid having to change the a arms to fix a bad ball joint.