World - Big Block Chevrolet Blocks

MERLIN III 9.800" Deck Iron Block

 

Now in its third iteration, World’s continually upgraded MERLIN cast iron block is the perfect foundation for any big block Chevrolet engine assembly. Made of a high density iron and manufactured to QS-9000 specifications on just two fixtures to eliminate tolerance stacking common on production lines, the MERLIN III can be bored to a maximum of 4.625” and is clearanced for a 4.375” crank. With a reinforced bottom end featuring 4-bolt splayed main caps, the MERLIN III can handle serious horsepower with complete reliability. It’s an excellent all-around value too!

 

MERLIN III 9.800" Deck Iron Block

 

TECHNICAL SPECS

Material: High Density Cast Iron
Deck Height: Standard 9.800"
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet
Main Bearings: Standard Chevrolet
Camshaft Location: Stock
Lifter Bores: Indexed (stock .8437" bore)
Bore: 4.240 (hone to 4.250") or 4.490 (hone to 4.500")
Maximum Bore: 4.625"
Cylinder Wall Thickness: .250" at 4.600" bore
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid (stock width)
Crank Clearance: 4.375" stroke
Main Caps: 4-bolts splayed, nodular iron or billet steel
Fuel Pump: OEM mount
Starter: OEM mount
Motor Mounts: Dual (front and side)
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 270 lbs.

 

Product   Description   Options
081100  

081100 MERLIN III bare block, 9.800" x 4.240"

Choose Billet or Nodular splayed 4-bolt caps

 

Main Caps

  • 081100 Nodular Caps
  • 085000 Billet Caps
    $2160.00     
         
081101  

081101 MERLIN III bare block, 9.800" x 4.490"

Choose Billet or Nodular splayed 4-bolt caps

 

 Main Caps

  • 081101 Nodular Caps
  • 085010 Billet Caps
     $2160.00    
         
 081102  

081102 MERLIN III bare block, 9.800" x 4.590"

Choose Billet or Nodular splayed 4-bolt caps

 

 Main Caps

  • 081102 Nodular Caps
  • 082012 Billet Caps
     $2160.00    

MERLIN III 10.200" Deck Iron Block

 

Now in its third iteration, World’s continually upgraded MERLIN cast iron block is the perfect foundation for any big block Chevrolet engine assembly. Made of a high density iron and manufactured to QS-9000 specifications on just two fixtures to eliminate tolerance stacking common on production lines, the MERLIN III can be bored to a maximum of 4.625” and is clearanced for a 4.750” crank. With a reinforced bottom end featuring 4-bolt splayed main caps, the MERLIN III can handle serious horsepower with complete reliability. It’s an excellent all-around value too!
MERLIN III 10.200" Deck Iron Block
TECHNICAL SPECS

Material: High Density Cast Iron
Deck Height: 10.200"
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet
Main Bearings: Standard Chevrolet
Camshaft Location: Stock
Lifter Bores: Indexed (stock .8437" bore)
Bore: 4.240 (hone to 4.250") or 4.490 (hone to 4.500")
Maximum Bore: 4.625"
Cylinder Wall Thickness: .250" at 4.600" bore
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid (stock width)
Crank Clearance: 4.750" stroke crank
Main Caps: Nodular iron or billet steel
Fuel Pump: OEM mount
Starter: OEM mount
Motor Mounts: Dual (front and side)
Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 270 lbs.


Product   Description   Options
081110  

081110 MERLIN III bare block, 10.200" x 4.240"

Choose Billet or Nodular splayed 4-bolt caps

 

Main Caps

  • 081110 Nodular Caps
  • 085100 Billet Caps
    $2160.00    
         
081111  

081111 MERLIN III bare block, 10.200" x 4.490"

Choose Billet or Nodular splayed 4-bolt caps

 

 Main Caps

  • 081111 Nodular Caps
  • 085110 Billet Caps
     $2160.00    
         
 081112  

081112 MERLIN III bare block, 10.200" x 4.590"

Choose Billet or Nodular splayed 4-bolt caps

 

 Main Caps

  • 081112 Nodular Caps
  • 085112 Billet Caps
     $2160.00    

MERLIN X Aluminum Block

 

In the highly refined MERLIN X aluminum block World Products has incorporated a significant number of key technical features that set it apart from the competition. And because it’s been designed specifically for the street, marine and “Super” drag class market, the price of the MERLIN X is very competitive. Dollar for dollar, you won’t find a better value in big block Chevrolet technology. It’s manufactured to QS-9000 quality control standards.

One easy to spot difference between the MERLIN X and others is the use of horizontal ribs. Not only do they look cool, but they also serve to improve engine cooling and reinforce the cylinder bores.

Total bottom end dependability is achieved through the use of 1045 alloy steel billet splayed 4-bolt mains (much stronger than commonly used 1020 steel) with genuine ARP main studs and bolts.

The MERLIN X is compatible with all GM Gen IV components (cam location is standard) and is the best foundation for building a large displacement big block Chevrolet with total reliability. Factor in pricing that’s more than competitive, and you’ve got a winner!

 

 MERLIN X Aluminum Block

 

 

TECHNICAL SPECS

 

Material: 357-T6 aluminum (strongest available)
Deck Height: 9.800" OR 10.200"
Deck Thickness: .600" minimum
Cam Bearings: Standard Chevrolet big block set
Main Bearings: Standard Chevrolet
Camshaft Location: Stock
Lifter Bores: Indexed (stock .843" bore)
Bore: 4.240" (hone to 4.250") , 4.490" (hone to 4.500") or 4.590" (hone to 4.600")
Maximum Recommended Bore: 4.600"
Cylinder Wall Thickness: (.115" @ 4.500" bore, .065" @4.600" bore)
Water Jackets: Expanded for better cooling
Lubrication: Priority main oiling system
Oil System Features: Rear main cap has provisions for wet sump pump, cross-feed lines between left and right lifter oil galleys
Filtration: Integral mount for spin-on filter
Oil Pan Rails: Solid (stock width) can be clearanced for strokers
Crank Clearance: 4.375"
Main caps: Splayed billet
Mounts: OEM starter and oil filter mounts
Block: Side ribs for extra strength & cooling - cross-ribs in valley
Motor Mounts: Dual (front and side) Cylinder Head Holes: Blind tapped to prevent leaks
Weight: Approximately 140 lbs. with sleeves



 

 

Product   Description   Options
085500  

085500 MERLIN X Bare Block, 9.800" Deck

Billet steel splayed 4-bolt caps

Please Choose Bore Size & Deck Height Part #

 

Part #

  • 085500 -   9.8 Deck 4.240" Bore
  • 085501 -   9.8 Deck 4.490" Bore
  • 085510 - 10.2 Deck 4.420" Bore
  • 085511 - 10.2 Deck 4.490" Bore
    $3997.00