Does anyone know if the rear swaybar from the self-levelling suspension of the 500E fits a 1988 300TE?

How about the rear self-levelling shocks from a 500E into a 300TE?

I just took our wagon to the track and it understeers considerably.

Also I noticed that the torsion link between the swaybar and the lower-control arm/hub assembly is a metal rod for the 300TE ($22/each), and plastic (?) for the 500E. I'm thinking I should keep the metal ones?

Thanks in advance,

:-) neil