Please check notes in each part listing to ensure the Differential Pinion Repair Sleeve is correct for your 1978 GMC K25 PICKUP with a 5.0L 305 engine. NATIONAL & SKF are competing brands, and each brand's Differential Pinion Repair Sleeve may be interchangeable. Special restrictions like "California only" or "with sport package" may indicate a Differential Pinion Repair Sleeve fits only certain 1978 GMC K25 PICKUP models.
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