I've rebuilt one of those stock carrier bearings, the rubber is pressed in and not intended to slide or move after assembly or in use.

A modern replacement carrier bearing, new bracket and all, might be more secure, perhaps secure enough?

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-