Is the Disco arm suitable? I ask because the KLR Automotive site says (in their spiel about the arm they sell):
See Pitman Arm (Drop Arm) with Ball Joint suit 4-Bolt Steering Box - KLR AutomotiveQuote:
Pitman arm to suit the 4-bolt steering box fitted to Perentie, Defender, some RRC. Does not suit the 4-bolt box fitted to the Disco 1. Comes with replaceable ball joint (Ball joint kit available as RBG000010). Lock washer for the nut is STC874. Replacement nut is NT614041L.

