Strip down the distrib to a bare shaft, fill stripped hole with silver braze on low flame. MAPP gas works best.
https://www.amazon.com/Harris-Safety-Silv-Silver-Solder-Brazing/dp/B0713Y6V2F/ref=pd_cp_469_1?pd_rd_w=dDcKR&pf_rd_p=ef4dc990-a9ca-4945-ae0b-f8d549198ed6&pf_rd_r=PG9KRVHQ4X65KNR3N839&pd_rd_r=78b87253-97b1-11e9-9c69-1d3c8f2acdb3&pd_rd_wg=iyhgk&pd_rd_i=B0713Y6V2F&psc=1&refRID=PG9KRVHQ4X65KNR3N839
Drill & tap new threads in a drill press to make sure hole is square to shaft & where you want it.