#227BPP12110327

BluePrint Engines BPP12110327 BBC Block, 9.800 Deck x 4.500 Bore

GM Big Block
9.800 Deck x 4.500 Bore
SIAM

Bore / Main Cap Type:

4.500 Inch / Billet Steel

4.500 Inch / Ductile Iron4.600 Inch / Ductile Iron 4.600 Inch / Billet Steel 4.250 Inch / Billet Steel 4.560 Inch / Billet Steel

$4,799.99

/each

Factory Shipped

Quantity

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Product Summary

Universal Fit, 4.500" Bore Size, Cast Iron, No

GM Big Block
9.800 Deck x 4.500 Bore
SIAM
Steel Billet Main Caps
2 Piece Seal

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Key Specs

MFG. Part #	BPP12110327
Brand	BluePrint Engines
Main Journal Style	454 mains
Deck Height	9.800"
Material Type	Cast Iron

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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

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855.313.9176

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BluePrint Engines BPP12110327 Details

When you’re building big power, you need a block that’s ready to carry the load—and this BBC-compatible foundation is engineered to take you all the way to a massive 598 cubic inches. Designed for serious street, strip, and marine performance, this block delivers the strength, rigidity, and machining precision needed for high-horsepower combinations. Thick cylinder walls, robust main webbing, and smartly engineered oiling and cooling pathways give builders the confidence to push displacement and power further without sacrificing reliability. Whether you’re crafting a torque-heavy cruiser or a high-rpm bruiser, this block is the rock-solid starting point your big-inch Chevy build deserves.

GM Big Block
9.800 Deck x 4.500 Bore
SIAM
Steel Billet Main Caps
2 Piece Seal

Cylinder Bore (Rough):

4.495" to 4.497"

Cylinder Bore (Max):

4.630"

Cam Bearings:

Durabond GM-12

Cam Bearing Bore ID:

2.120"+/- .001"

Camshaft Position:

OEM

Cam Drive / Timing Set:

OEM / Double Roller

Cam Retaining Plate:

OEM

Cubic Inch (Max):

598

Cylinder Wall Thickness:

.310" Nominal @ Max Bore

Cylinder Skirt Length:

6.300" Nominal

Deck Height:

9.800" +.005" / -.000"

Deck Thickness:

.710" Nominal

Freeze / Core Plugs:

1-5/8" x 8

Head Bolt / Stud Threads:

7/16-14 UNC

Lifter Bores:

.8437" +/- .0003"

Lifter Retainer (If not using tie bar lifters):

OEM W/Roller Provisions

Main Bearing Bore (Line Honed):

2.937" - 2.938"

Main Bearing Caps:

Steel Billet

Main Cap Bolts:

1/2"-13

Main Fastener Tensile Strength:

180,000 to 210,000 PSI

Material (Block):

EN-GJL-250 Iron

Oil System:

Priority Main

Oil Pump:

OEM

Oil Filter:

OEM

Oil Pan:

OEM (GEN IV)

Rear Main Seal:

2 piece - Seal (OEM GEN IV)

Starter:

OEM

Stroke (Max):

4.750"

Timing Cover:

OEM GEN IV

Approx. Weight with Main Caps:

240-260lbs

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

WARNING:

Cancer and Reproductive Harm – www.P65Warnings.ca.gov

CARB warning

BluePrint Engines BPP12110327 Specifications

KEY SPECS
MFG. Part #	BPP12110327
Brand	BluePrint Engines
Main Journal Style	454 mains
Deck Height	9.800"
Material Type	Cast Iron

GENERAL
Bore Size	4.500"
Rear Main Seal Style	2-piece
Sold in Quantity	Each
Freeze Plugs Included	No
Cam Bearings Included	No
Weight	260 lbs.
Finished Cylinder Bores	No
Main Bearings Included	No
Main Cap Fasteners Included	Yes
Main Cap Material	Billet Steel
Main Caps Included	Yes

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