Glenn - After researching Bill's reply above on the GMC bearing info, I found that the rubber cushion is listed in both GMC and Chevy Master Parts Books as GM# 3657610. Fits Chevy 3/4 tons from 1941-53 and confirmed it at least fits 1951 GMC 3/4 tons as its listed in the Dec 1950 GMC Master Parts Book.

Here's an NOS GM# 3657610 offered for under $10 + shipping on evilbay.

You can also order reproductions from vendors, like The Filling Station #DS-259 for a reasonable price.

Get you some parts and get back to work, would ya? - hahaha! grin

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)