4 Bolt main
4.00" bore
Passenger side dipstickĀ
Align honed main bearing bore
Cylinders honed on computer controlled machine to within .0002 straightness and roundness
Cylinders are sonic tested for thickness
This engine features a true 4 inch bore, which mathematically yields 377 CID with a 3.75 inch stroke.
This engine requires a weighted 8" harmonic balancer (included), andĀ late 350ciĀ weighted flexplate/flywheel.
Please see Recommended Add On's page for additional parts.
The HP and Torque numbers derived from dyno testing with a 750cfm carb, and withĀ H8002KĀ cylinder heads installed.
*A bronze distributor gear is NOT recommended on this engine
Not for use in pollution controlled vehicles
Ā 
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 ā 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.
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.
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)!
