World Merlin IV Big Block Chevy Race Block

World Merlin IV Big Block Chevy Race Block


AwesomeEngines® offers the World Merlin IV big block Chevrolet redesigned block. Incorporating numerous new improvements and features as thicker main webs for increased strength, thicker cylinder walls which are nominally .310″ @ 4.600 bore. The oiling system is revised with enlarged passages and cross overs in front, uses simple pipe plug type restrictors, .500″ oil galley is relocated so 55mm cam does not require lifter bushings. The block will accept cam journals up to 2.480″ or 60mm babbitt and 1.060″ lifter bores. Also new deck heights from 9.500″ to 9.850″ and 10.200 to 12.250″

Fully Race Prepped Includes


Align honed • CNC blueprint bored • CNC blueprint square decked 90° from crank and cam bar to your required deck height • Plate honed from 4.250″ to 4.600″ bore sizes • Hot washed, brass freeze plugs and cam bearings installed for a ready to install your old rotator or a brand new one from us into this brand new block

Complete Rotator Installed

Dart 4.000 to 4.750″ 4340 Crank, internally balanced on a CWT Multi-Bal 5000 Machine to .30 oz inch ­ ­• AwesomeEngines® 6.135 to 6.700″ I or H Beam New Steel Rods • 8:1 to 15:1 Compression Cast Aluminum stock, Mahle, SRP or Pro True Forged Pistons • Moly Rings • Clevite or King Stock or Race Main and Rod Bearings • Rear Main Seal Installed



Fully Race Prepped and Ready to Assembly Option
+ $ 895.00
.904″ Lifter Bore
+ $ 250.00
Bronze Lifter Bore Bushings Installed and Reamed to Fit
+ $ 495.00
Up to 1.060″ Lifter Bore
+ Call
55mm Roller Cam Bearings
+ $ 795.00
60mm Babbitt Cam Bearings
+ $ 795.00
9.850 or 10.250 Deck Height
+ $ 250.00
461ci Large Bore to 4.600″ Option
+ $ 250.00
Dart 4340 4.0-4.75″ Internally Balanced Steel Crank, 6.135-6.700″ H Beam Steel Rods, ARP Rod Bolts, Mahle, SRP or Pro True Forged Pistons, Rings, Race Bearings
+ $2095.00
Comp Cams Hydraulic Flat Tappet Camshaft and Lifter Kit Below
+ $ 395.00
Hydraulic or Solid Roller Camshaft and Lifter Version
+ $ 975.00
Deluxe Hydraulic Flat Tappet Camshaft and Lifter Complete Short Block Kit Below
+ $ 850.00
Deluxe Hydraulic or Solid Roller Camshaft and Roller Lifter Complete Short Block Kit Upgrade
+ $1595.00
Cometic or Fel Pro MLS Stainless Steel Marine or Power Adder Head Gaskets
+ $ 195.00
ARP Head Bolt Kit Used For Plate Honing the Block (from)
+ $ 150.00
Brand new Internal Flex-plate and Damper for 454 t0 632ci
+ $ 150.00
SFI Rated Brand new Internal Flex-plate and Damper for the Same
+ $ 295.00

Cam Shaft Kit

  1. Comp Cams Up To .550″ Lift Hydraulic FT Camshaft (roller ava)
  2. Heavy Duty True Double Roller Timing Set
  3. Camshaft Fastener Kit Buttoned Up
  4. 16-Hyd Flat Tappet Lifters
  5. Degree Camshaft

Deluxe Short Block Kit

  1. Above Hydraulic FT Cam Shaft Kit Installed Properly (roller ava)
  2. Solid Polished Aluminum Timing Cover Kit Installed
  3. AwesomeEngines® TDC Adjustable Timing Pointer
  4. New Internally Balanced Damper TDC Verified
  5. Melling Oil Pump Kit and Proper Pick Up
  6. Moroso 7 Quart Oil Pan Installed
  7. One Piece Oil Pan Gasket

Internally Balanced Short Blocks Come with Blue Print, Balance Sheet, Product Information, Stickers and Contingency Information

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