Product Description
Genuine Lempco S-391 Crankshaft Gear (NORS)
This Lempco S-391 crankshaft gear is a New Old Replacement Stock (NORS) component designed for a wide range of General Motors V8 engines from 1967 to 1982. This 18-tooth gear is a critical part of the engine's timing system, ensuring precise synchronization between the crankshaft and camshaft. It fits various Buick, Chevrolet, GMC, Oldsmobile, and Pontiac models equipped with 262, 267, 283, 302, 305, 307, 327, 350, 350L, and 400 cubic inch V8 engines, including popular models like the Chevrolet Camaro, Chevelle, Impala, and C/K Series Trucks, as well as Buick Regal, Oldsmobile Cutlass, and Pontiac Firebird.
Key Features:
- Brand: Lempco
- Part Number: S-391
- Replaces OEM number: 3896959
- Position: Crankshaft
- Engine Fitment: GM V8 262, 267, 283, 302, 305, 307, 327, 350, 350L, 400 CID
- Origin: Made in USA
- Condition: NORS (New Old Replacement Stock)
Fitment:
| Make | Model | Year | Engine | Notes |
| Buick | Various | 1977-1982 | V8 267, 305, 350L | |
| Chevrolet | Camaro / Chevelle / Nova / Impala / Caprice / Monte Carlo / Corvette / C10 / K10 / C20 / K20 / Blazer / Suburban | 1967-1982 | V8 262, 267, 283, 302, 305, 307, 327, 350, 350L, 400 | Includes Light Duty Trucks |
| GMC | Sprint / Jimmy / C/K Series Trucks / Suburban | 1967-1982 | V8 283, 305, 307, 350L | Includes Light Duty Trucks |
| Oldsmobile | Cutlass / Delta 88 / Ninety-Eight / Omega / Starfire | 1977-1982 | V8 267, 305, 350L | |
| Pontiac | Firebird / Grand Prix / LeMans / Catalina / Bonneville / Grand Am / Ventura | 1971-1982 | V8 305, 307, 350L |
Fits Years:
1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982
Note on Stock Photos: Due to our inventory of multiple identical units for this specific part number, we utilize representative stock photos for this listing. You will receive a component that strictly meets all listed specifications and fitment requirements. Please be aware that because these are vintage parts, minor cosmetic variations—such as surface finish, color, or production markings—may exist between different manufacturing runs. These slight aesthetic differences are a result of historical production processes and do not impact the part's integrity, performance, or authenticity.
A Note on Fitment Accuracy: We manually research our fitment data using vintage manufacturer catalogs to provide you with the most accurate information possible. However, because we are human and these decades-old resources can occasionally contain errors, we cannot guarantee 100% accuracy. We strongly encourage you to perform your own due diligence and verify this part number for your specific application before purchasing. Please note that this part may also fit other vehicles or years not explicitly listed in our research.
Unbeatable Prices & Expectations
While many of our vintage parts were manufactured decades ago, they remain unused and high-quality. Some original boxes may show signs of shelf-wear, such as dust, tape, or surface distress from years of storage. Rest assured, the components inside have been inspected to ensure they are complete and ready to help you finish your project without breaking the bank.
