Looking at the age of your Mog it could be within the era of when MMC tried using nylon bushes within the kingpin setup
If that is the case & new kingpins were fitted it requires an oversize bronze bush set (still needs reaming) this could be where your 'bodge' lies
Morgan Motor Company used proprietary plastic bushes—specifically, blue Devlon S (a polyethylene plastic)—in their kingpins from roughly 2001 to 2005/2006.
