Performance Racing Engines

World Products Blocks

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Weinle MotorSports Sells the entire line of World Products Blocks

Prices starting at:

  • Motown SBC CNC Iron Block - $1650
  • Motown SBC CNC Aluminum HardCore Block - $4000
  • Merlin BBC CNC Iron Block - $1780
  • Merlin BBC CNC Aluminum HardCore Block - $4500


Detailed Specs available at

World Products Introduces New "Motown" Small Block Now available from World Products is an enhanced replacement for the Chevrolet small block that incorporates many features of expensive racing blocks, but is quite affordable. World's new "Motown" block is made of high density cast iron and reinforced in all critical areas. Important features include front and rear bulkheads that are substantially thicker than stock, reinforced main webs with dowel-registered nodular iron 4-bolt main caps (with beefy 1/2" bolts), and thicker cylinder walls. The Motown block features expanded water passages (there are bulges in the block) to provide necessary cooling for the larger displacement configurations.

The Motown block comes with a choice of 4.000 or 4.125 bores (it can safely be overbored to 4.200") and can accommodate a 3.875" stroke crankshaft (with I-beam steel rods) without requiring additional machine work to the pan rails. This will provide up to 415 cubic inches of displacement in "standard" form.

Other important features of the Motown block include a priority main oiling system, indexed lifter bores and "blind" tapped head bolt holes that avoid water passages. It is 100% compatible with factory small block Chevrolet components, maintains the stock cam location, and can utilize an OEM oil pan. There are also integral bosses for front-feed oil systems and rear dry sump scavenging.

If you were a performance enthusiast looking for cylinder heads prior to 1987, your choices were limited to scrounging through junkyards, going to a dealership for OEM parts, or spending a small fortune on aftermarket aluminum racing heads. There was no in between option. At this point, noted speed merchant Bill Mitchell and a skilled team of engineering and manufacturing personnel collaborated to develop an affordable cast iron head for the small block Chevrolet that delivered impressive performance gains. Their first offering, the World Products Dart II® cylinder head, became an instant success and was named �Product of the Year� in 1988 by Hot Rod Magazine. With the ability to bolt-on an increase of 30-70 horsepower with no other changes, and be affordable to the average performance enthusiast, World Products started a revolution in the industry. It is also important to note that this head (which has subsequently been improved upon and is now known as the Sportsman II), has undergone extensive testing by the C.A.R.B. and was issued E.O. #D-343-1. It is 50-state emissions legal. Moreover, it remains the ONLY high performance cast iron small block head to be certified. Big block Chevrolet enthusiasts were next to benefit from World Products �magic� in the form of the highly effective Merlin line of cylinder heads and engine blocks. Ultimately, the line has expanded to include both aluminum and cast iron blocks and cylinder heads� with complimenting intake manifolds. From Pro Stock and Pro Mod drag cars to off-shore boats, you'll find Merlin power in charge. This year the Merlin line has been bolstered by the addition of new �Merlin-X� blocks, cylinder heads and intake manifolds. These represent a remarkable combination of advanced designs and state-of-the-art manufacturing technology to provide greater levels of performance at affordable prices. World's commitment to Ford enthusiasts has also increased significantly, thanks to the introduction of the Man O'War cast iron replacement block for 302/351 engines, as well as an aluminum block for 4.6/5.4L modular engines. With the block also came a natural progression to crate engines, with a wide variety of �Blue Oval� powerplants now available. And speaking of crate engines, due to popular demand you'll now be able to get more docile, fuel efficient engines in the form of new �Daily Driver� and �Cruiser� series for the street. They're all dyno-tested and certified to meet or exceed published performance levels. With expanded production and R&D capacity at its Ronkonkoma, NY headquarters, and a significantly increased lineup of blocks, cylinder heads and components, World Products looks toward a great 2005.


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