Guys, I am installing alloy swing arms from a 75 911 on my 1973 S (with sporto and a/c). I am also replacing the rear bushings with Neatrix.

The 75 section of the manual (source of the alloy 75 swing arms) says that the angle of the trailing arm at reassembly is 42 degrees. The 1973 section of the manual says that the trailing arm angle is 37 degrees. So which figure do I use when I put the rear suspension back together? I suspect that the 73 body/torsion bar combo overrules the 75 swing arms and that I would use the 37 degree angle. However, prior to proceeding I though that I might ask for help.

New question: the 75 section of the manual says to add half a degree for sporto and half a degree for a/c. Assuming that I use the 73 firgure of 37 degrees, do I add a degree for the sporto and a/c?

As always, thanks for the help. I have been out in the garage working on the car and so have not spent much time listening to all the good advice. But I do appreciate the help. Thanks

Caproader (The Capitalist Roader)