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Instruction Sheets for Part Number WRL-095010-55
World Products Merlin IV Engine Blocks
Engines, Bare Block, Cast Iron, Merlin IV BBC, 9.800 in. Deck, 4.495 in. Bore, Billet Caps, 55mm Babbitt Cam Bearings and 0.904 in. Lifter bores, Each
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Estimated Ship Date: Nov 30, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
095010-55
Part Type:
Product Line:
Summit Racing Part Number:
WRL-095010-55
UPC:
816642021613
Main Journal Type:
Chevy 454
Engine Block Material:
Cast iron
Engine Block Style:
OEM
Engine Block Deck Height:
Standard deck
Deck Height (in.):
9.800 in.
Cylinder Bore as Shipped:
4.495 in.
Maximum Bore Diameter (in.):
4.625
Camshaft Location:
Standard
Engine Block Weight (lbs.):
260 lbs.
Main Bolt Style:
4-bolt
Main Caps Included:
Yes
Main Cap Material:
Billet steel
Main Cap Fasteners Included:
Yes
Main Bearings Included:
No
Rear Main Seal Style:
2-piece
Finished Cylinder Bores:
No
Raised Cam Location:
No
Cam Bearings Included:
No
Freeze Plugs Included:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
2.283 in. cam bore. Requires +.300 in. taller .904 in. diameter lifters.
World Products Merlin IV Engine Blocks
World Products has made improvements to virtually every area of the new Merlin IV engine blocks—with the goal of producing the most technologically advanced and best-performing iron BBC block available today! New features include thicker main webs for increased strength and thicker cylinder walls which are nominally .310 in. @ 4.600 in. bore. In addition to the standard BBC 9.800 in. and 10.200 in. deck heights, new heights measuring 9.500 in., 9.850 in. and 10.250 in. are now available. The World Products Merlin IV engine blocks are also available with a 2.120 in. BBC cam journal and standard .842 in. lifter bores, or with a 2.283 in. journal for a 55mm Babbitt cam and .904 in. lifter bores. World Products has added a front oil feed for dry sump systems, and relocated the lifter oil feeds and restrictor provisions to the front of the blocks.
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