The parts book actually calls for a 5 blade (18.5" dia) part# B7Q8600C. The parts book shows ONLY 5 blade fans for all trucks 1948-56, so I wonder if the 4 blade was supposed to be on the passenger cars.
38 Coupe, I see you changed the pic you posted, where was that one from, as it indicated the fan part # to be 8602?
Anyhow, Part #B7Q8600c
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