Hi! I’m looking for a new fan belt for the fan-alternator to my Buick Century 1957 with 364 without Ac. Wonder what size I should buy? thank you! /Christine
All '57 without ac is an 1163447 3/8 x 53 inches If you go to a 7/16 belt the length should go up a 1/2 inch. 7/16 x 531/2 = 9433759 Dayco = 15530.