485397 is the odd 5 3/4" diam w/p pulley, used on auto a/c 455HO Bird applications.
481040 is the common 6 5/8" w/p pulley, used on 4 spd a/c 455HO applications.
481038 is the common '71+ a/c appl crank pulley.
May have a few more 485397's.
Ship out a few 037, 038, 039 & 040 pulleys each month.
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