Three clicks was an MOD demand, I worked for a FORD main dealer in the 1970's and had to set H/B at between 4 and 7 clicks, until the twin wheel Transit had to be tested a the MOT testing station unlike the MOT garage. SO the testing staion was failing them, FORD then sent a Technical Sevice Bullitan to all fitters. IF your Transit fails MOT for to many clicks. return to workshop and remove H/Blever, Proceed to grindston and remove the first pauls fom the assy then refit. This now gave three clicks at the lever
That is one TSB that I wish I had kept