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Merlin III Cast Iron Blocks

   The Merlin III incorporates such important features of the race block as reinforced bulkheads and main webs, thicker decks, and a priority main oiling system—plus essentials for street use, like using the stock Chevy oil pan pattern, OEM 2.750" mains and 100% compatibility with Mark IV components. It has provisions for a spin-on oil filter, while the indexed lifter bores assure optimum reliability.

   Users now can choose between nodular iron 4-bolt mains or splayed steel billet caps. It’s important to note that World’s Merlin III blocks are far superior to OEM parts in terms of quality. Each block is precision CNC-machined using only two fixturing operations. Compare this to factory-built blocks, which are done on a production line and passed from machine to machine, causing what is known as “tolerance stacking.” World blocks are manufactured to QS-9000 specifications —the global standard of excellence.

   Merlin III blocks are available with 4.240, 4.490 and 4.590” bores (to be finish honed by the purchaser) or completely race-prepped. Choice of standard 9.800" or tall 10.200" decks. It’s an excellent value in big block power!