u/IndependentGuard2611

I’m looking to replace my steering coupler on my ‘91 e30 convertible that I use as a cruiser. Would a poly coupler be significantly harsher than the OE rubber one? Also does anyone know the hardware specs (bolt sizes and thread pitch)

Fronts show 72738 - 2003.001
Rears show 65961 - 2003.202

Not finding much about them when searching the numbers and wanted to know if someone knew more about them?