Larry, That part number is correct according to my 1929-53 Master Parts Book. Also used on 3/4 ton 3600 models in case you are searching for a serviceable used one.

There is an NOS pair of them offered GM# 379656 * in this eBay ad. A number of others offered in singles and multiples, but this one seemed to be the best price deal. Should fix your buddy right up! thumbs_up

*NOTE: As usual the eBay ad descriptions lack complete info on models/trucks these were used on.

~ Dan
1951 Chevy 3 window 3100
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