46 should be the year it was made.
I was just working on two harrison radiators for a 49, both had 49 stamped in the top tank, the side facing the engine.

•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
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