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| | | Forums66 Topics128,087 Posts1,055,985 Members48,430 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | Wondering if anyone knows the part number for the lower crankshaft pulley for a 454, 3 groove with a long water pump? Application would be 73 and up pickup, 454 with a/c and p/s. Thanks | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy don stocker, I don't have a light duty book that new, but I found the following in a car book p/n 3972180, it's listed as 73-74 350 and 400 with taxi, police 61, 63, or 80 amp - 3 groove, hope that helps. | | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | Thanks 3B, I think that the big block pulley looks close to a small block with one difference, the center bolt and washer goes on after the pulley. The big block has a larger center hole and the center bolt and washer go through the pulley. | | | | | Joined: Nov 2005 Posts: 6,100 'Bolter | | 'Bolter Joined: Nov 2005 Posts: 6,100 | Hy don stocker, I dug through my pile of infrequently used books, and I found a light duty book which covers 1973-77. The part number for a 454 3 groove pulley is 3937787, hope that helps. | | |
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