Ford 347 stroker crate engine is a popular high-performance upgrade for classic Fords, typically built by stroking a Ford 302 Small Block (5.0L) to increase displacement to 347 cubic inches (5.7L). This configuration is favored for its compact size, lightweight design, and significant torque gains over a standard 302
347 Ford Stroker Crate Engine With 425 HP
- Fully machined seasoned 302 block
- Block painted with 3 coats of high temp ceramic engine paint customer’s choice of color
- Steel crankshaft 3.400 stroke (Eagle or Scat)
- I-Beam connecting rods (Eagle or Scat)
- High performance forged pistons (Icon, Mahle or SRP)
- Performance rod and main bearing (Clevite, King or Federal Mogul)
- Performance rings hand filed to match application
- ARP main bolts
- The complete rotating assembly is balanced
- Three piece double roller timing set
- Custom ground hydraulic roller camshaft
- Hydraulic roller lifters
- Performance aluminum cylinder heads (AFR or Edelbrock)
- Screw in studs and hardened guide plates
- Chrome moly push rods
- Performance roller rockers
- Melling oil pump and screen
- Front sump oil pan
- Dipstick and tube
- Aluminum timing cover with scale
- Fel-Pro gaskets
- Performance balancer
- Aluminum valve covers with baffles (Polished or Black)
- Performance intake manifold (Edelbrock)
- Thermostat housing to match application
- Holley Sniper II EFI
- Holley Hyper Spark Distributor (Requires CDI Box)
- Coil & Bracket (MSD)
- Spark plugs
- Ignition wires
- Wire looms
- Fuel Pump Block Off Plate
- Valve Cover Breathers (Polished or Black)
- Water pump (to match application)
- 6 Quarts of oil
- Oil filter
- Engines are photo documented during the building process
- 2 Year unlimited miles warranty
Dyno Testing
Proformance Unlimited measures over 30 parameters that are monitored and logged to the computer during each engine test. A complete printout, including graphs.
We tune your engine on the dyno for maximum power. No more endless trial and error methods at the track are required. You see your results instantly! Dynamometer testing costs a fraction of what you have invested. Take the guesswork out of tuning – by dynoing !
This system includes the following items:
- Your engine will be broken in under various load conditions
- Tested in real world conditions through headers and mufflers
- Precise horsepower and torque rating with graph and numerical print out
- Induction system tuned for optimal performance
- Dyno session video taped
Dress Up
Custom Painted Engine
Have a custom painted car? Why not have a custom painted engine? Give us your paint code and we’ll do the rest.
This system includes the following items:
- Custom paint
Add $550
Most 347 crate engines are offered in various stages, from “long blocks” (requiring your own intake and carb) to “turn-key” packages.
- BluePrint Engines 347 Stroker (415 HP): A widely available option featuring aluminum heads, a hydraulic roller cam, and forged pistons. It produces 415 HP and 415 ft-lbs of torque.
- Ford Performance 347 Sealed Racing Engine: Designed for circle track or competition use. Built with a BOSS 302 block, it includes a forged rotating assembly and is rated at 415 HP and 400 lb-ft of torque.
- Prestige Motorsports 347 Series: Offers tiered performance packages including 425 HP (daily driver friendly), 440 HP (aggressive street), and 500 HP (performance enthusiast) versions.
- Roush Performance 347 SR/IR: High-end builds producing 450–465 HP. Options include CNC-ported heads and fuel injection systems like an 8-stack intake.
- ATK High Performance HP100C: A Stage 3 complete engine producing 450 HP. It often comes with a carburetor, distributor, and water pump included.
- Bore x Stroke: Typically 4.030″ bore with a 3.400″ stroke.
- Compression Ratio: Usually around 10:1, designed for 91+ octane pump gas.
- Rotating Assembly: Often upgraded with forged pistons and steel crankshafts to handle the increased power.
- Balance: Most 347 engines require a 28 oz. external imbalance flywheel and damper, though some high-end racing versions are internally balanced.
