Custom caster rods (aka "castor rods" aka "tension rods" aka "radius rods") are useful when you wish to add more caster. The 1200s rods are non-adjustable and subject to slight binding when a lot of caster is dialed-in.
Also see Tension Rod for the stock item.
Overview
Longer castor rods:
Adjustable Caster Rods
Another way to use adjustable radius rods.
A set of GM LJ Torana rods that have adjustment, but drilling is required to fit the thicker rod to the body, and modifications need to be made to the rod to match the balljoints.
- 510/1600 rods
- pivoting strut rods(sometimes seen in Japan)
- lc torana castor rods: GM Holden Torana adjustable caster rods into Datsun 1200