Original part number for 61-63 P/8 was 538568 for manifold outlet. 538821 for hose. Which should be the PP249 number. Back in 1961 there was a Craftsman News item cautioning to cut 1 inch from the radiator end to prevent wearing a cut where the hose rubbed the left air silencer snout. But I presume the 538821 number had taken that into consideration and if you don't use the big air cleaner anyway it shouldn't matter.
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