Product Description
Genuine Sealed Power 4663M Main Bearing Set (NOS)
This New Old Stock (NOS) Sealed Power 4663M Main Bearing Set provides precision-engineered support for the crankshaft of your Small Block Chevrolet V8. Manufactured in the USA, this high-quality bearing set is designed specifically for "Large Journal" (2.450" main) applications, ensuring optimal oil clearance and long-term durability for 1967–1974 302, 305, 307, 327, and 350 engines. This set is the correct fitment for 1967-1974 Chevrolet Camaro, Corvette, Chevelle, Nova, Impala, and Caprice, as well as GMC C10, K10, and Suburban trucks, Checker Marathon, and Pontiac Ventura models equipped with the SBC powerplant.
Key Features:
- Brand: Sealed Power
- Part Number: 4663M (Interchange: 14663M)
- Position: Crankshaft Main Bearings (Full Set)
- Engine Fitment: Small Block Chevrolet (SBC) V8 - Large Journal
- Origin: Made in the USA
- Condition: New Old Stock (NOS)
Fitment:
| Make | Model | Year | Engine | Notes |
|---|---|---|---|---|
| Chevrolet / GMC | C10 / K10 / C15 / K15 / Suburban | 1967-1974 | V8 307 / 327 / 350 | Large Journal Only |
| Chevrolet | Camaro / Corvette / Nova / Chevelle | 1967-1974 | V8 302 / 307 / 327 / 350 | Large Journal Only |
| Chevrolet | Impala / Caprice / Bel Air / Biscayne | 1967-1974 | V8 307 / 327 / 350 | B-Body Platforms |
| Checker | Marathon / Taxicab | 1968-1974 | V8 307 / 327 / 350 | SBC Equipped |
| Pontiac | Ventura / Firebird | 1971-1972 | V8 307 / 350 | SBC Equipped |
Fits Years:
1967 1968 1969 1970 1971 1972 1973 1974
Note on Photos: The images provided are of the actual item you will receive. Please inspect the photos carefully to confirm the condition and specific features of the part. Because these are vintage components, minor surface variations or packaging wear may be present; however, the part pictured is the exact unit being sold.
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.
