All HQ & HJ Holdens, up to around Feb/March 1976 had the short arms, both manual & power steer.

From then onwards manual steer cars got the longer arms to reduce the steering effort, due to the increased standard fitment of radial tyres.

This remained the same until the end of WB.

So you only need to change to the shorter arms when doing a p/st conversion on those cars built after Feb/March 1976.

Always make sure your p/st HQ-WB has the short arms fitted, otherwise the turning circle & toe-out on turns alignment will be incorrect.

Dr Terry