Building or rebuilding a classic Big Block Chevy? This high-volume oil pump is a key upgrade. The part number is M-77HV (also crosses to 601-1050, 224-4153). It's designed to be compatible with Melling pumps and fits a huge range of BBC engines: 366, 396, 402, 427, 454, 496, and 502 cubic inch motors. That covers classics from the 60s and 70s all the way up to the modern 8.1L Vortec L18. A high-volume pump moves more oil, which is great for performance builds, engines with looser bearing clearances, or just ensuring solid oil pressure and lubrication under all conditions. It's a direct replacement part that should come with everything you need. Always double-check fitment for your specific year and application, but this is a go-to pump for many BBC enthusiasts looking for reliable oiling.
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