Overview:
The Blueprint Engines 383 ci stroker crate engine combines classic muscle with modern performance, dyno-tested at 436 hp and 443 lb-ft of torque, and features a genuine Holley Sniper 2 EFI system. Housed in a one-piece rear main seal BluePrint Engines High Strength Cast Iron 4-bolt main Block with a 4.000″ bore and 3.750″ stroke (383 ci), it features high-quality internals like a 544 Intake / .555 Exhaust Lift and 230 Intake / 236 Exhaust Duration @ .050 - 110° LSA hydraulic roller camshaft, hypereutectic pistons, 5.700″ rods, and Blueprint’s aluminum heads sporting 64cc chambers and raised ports. This engine is externally balanced front and rear for reliability and smooth operation.
The Sniper 2 EFI breathes through the satin dual-plane intake, offering crisp throttle response, self‑tuning via next generation ECU, and compatibility with modern fuels. It eliminates cold-start woes and rough idling, transforming the driving experience into one of modern efficiency on a vintage platform. Finished with a complete dress‑up kit—timing cover, valve covers, HEI distributor, and more, it’s a turnkey powerhouse that blends effortless drivability with classic muscle aesthetics.
Description:
- Horsepower and Torque: 436 Horsepower / 443 ft. lbs. TorqueÂ
- Compression Ratio: 10.0:1
- BluePrint Engines Aluminum Heads
- BluePrint Engines Hydraulic Roller Cam
- BluePrint Engines Cast Crankshaft
- BluePrint Engines Hypereutectic Pistons
Block:
- BluePrint Engines High Strength Cast Iron Block
- Manufactured and Machined in the USA!
- Drilled and Tapped for Clutch Linkage
- Mech Fuel Pump Provision: Yes
- Passenger Side Dipstick
- 1-Piece Rear Main Seal
- 4-Bolt Main
- 4.000" Bore
Rotating Assembly:
- Cast Crankshaft
- 3.750" Stroke
- OEM Type 5.700" Connecting Rods w/ 150,000 PSI Bolts
- Hypereutectic Pistons
- Externally Balanced Front and Rear
Cylinder Heads:
- BluePrint Aluminum Cylinder Heads - H8002K
- 64cc Chamber
- 2.02" Intake / 1.60" Exhaust Valves
- 195cc Intake / 75cc Exhaust Runners
Cam Specs:
- Hydraulic Roller
- .544 Intake / .555 Exhaust Lift
- 230 Intake / 236 Exhaust Duration
- @ .050-110 Degree Lobe Separation
Ignition Timing:
- 34 Degrees Total at 3500 RPM
Also Includes:
- Standard Rotation Long Style Water Pump - BPP67265
- Holley Sniper 2 EFI System - BPP550-510-3XX
- Aluminum Intake Manifold -Â BPP350VINT
- Thermostat and Thermostat Housing
- HEI Distributor - BPP350RBK
- Valve Covers - BPP9518
- Spark Plugs and Wires
- Harmonic Balancer
- Timing Cover
- Oil Pan
Notes:
- This engine features a true 4-inch bore, which mathematically yields 377 CID with a 3.75-inch stroke.
- Not for use in pollution-controlled vehicles.
- The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.
- *Intake Will not clear a stock Corvette hood. Please call for special build options.
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)!