Overview:
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.
Cylinder Bore (Rough):
- 4.549" to 4.551"
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 car lifters):
- OEM W/Roller Provisions
Main Bearing Bore (Line Honed):
- 2.937" - 2.938"
Main Bearing Caps:
- Billet Steel
Main Cap Bolts:
- 1/2"-13 UNC
Main Fastener Tensile Strength:
- 180,000 to 210,000 PSI
P1 Main Stud Kit P/N:
- TBD
ARP Main Stud Kit P/N:
- TBD
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
WARNING: Cancer and Reproductive Harm-
www.P65Warnings.ca.gov
BETTER THAN THE REST.
The satisfaction of our customers is our highest priority at BluePrint Engines. We use quality components to balance your engine's rotating assembly within two grams of spec. We dyno test your crate engine and certify that it's ready to deliver horsepower and torque.
We give your BluePrint engine the industry's best-in-class warranty for 30-months / 50,000 miles — with the extra confidence only BluePrint can provide. Our warranty applies to individual or professional installations and is fully transferable.
For a detailed overview of our warranty, click here.
IT ALL COMES DOWN TO RESULTS.
We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That's precisely why our engines sound and run better than our competitors.
BRAGGING RIGHTS INCLUDED!
A comprehensive, dyno-generated printout showing these critical specs will accompany your delivered engine. No more guessing or wondering what your installed engine's real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash 'em your dyno results!
This engine will be dyno tested before it ships to you at no additional charge (others charge $500)!