Makes no difference, there is a lot of hooey about which does what but if you look at the kingpin drilled for the later top nipples the central drilling goes down and across to an annular groove on the kingpin that sits when assembled between the stub axle bushes so it fills the void. The stub axle nipple is drilled to the very same void. I had one owner who didn’t believe this until when doing his kingpin job I dry assembled and greased the top nipple, pulled apart and the void was full, washed out dried and next time greased Just the stub nipple and again grease in same place. He didn’t question it after that, and he is on here but won’t embarrass him ;-).
BR
Colin
