Rear brake drum for AMI - 180mm

This rear brake drum for AMI 6 and AMI 8 - 180mm is to be modified.
This new 2CV rear brake drum requires reworking of the bearing cage to adapt it to the larger wheel bearings of the AMI6 and AMI8.
the bearing cage is not the same, the bearings are bigger and thicker 36x76x29mm against 35x72x27mm for the 2CV bearings.
There is no remanufacturing for AMI drums and finding used ones in good condition is illusory. the solution is to machine the cage to fit the larger bearing.
The small difference in bearing and diameter will not affect the mechanical strength of the drum.