Future maintenance problem?
Huh? Needing grease or a rebuild every forty years is a maintenance problem?
Drill for a grease fit at the bottom of the coupler, blow a load in it once a decade. No big whoop, and doesn't leave those of us that have seen the chassis flex in these cars shaking their heads.
I love watching people solve non problems. If you want to solve future maintenance problems, go after something like rod bearings next time.