




347 Ford Long Block
Nevermind all those old-school naysayers. The 347 Ford Small Block Stroker is the only way to go if you are looking for a street engine upgrade for your 302 Ford. Our 425/440HP version was developed to provide excellent low-end torque and acceleration for street driving. Drivability and vacuum at idle are also better than a 331 Stroker with the same peak power level. This would be an excellent addition to a Cobra Kit Car!
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Fuel Type
Max RPM
Idle Quality
Best Use
Horsepower: | 425/440 |
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Torque: | 425 |
Bore/Stroke: | 4.030 x 3.400 |
Compression: | 10:1 |
Fuel Type: | Pump Gas, 93 AKI (USA) / 98 RON |
Block: | OEM 302 Core |
Crankshaft: | Cast Steel (Eagle or SCAT) |
Rods: | I-Beam, 5140 Forged Steel (Eagle or SCAT) |
Pistons: | 4032 Forged Aluminum 5cc valve relief (DSS Racing, JE, Racetec or Mahle) |
Bearings: | King or Clevite Rod & Mains, Durabond Camshaft |
Camshaft: | Hydraulic Roller (COMP, Howards or Cam Motion) |
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Heads: | PM aluminum as cast 180/185cc intake 58cc chamber |
Valves: | Forged Stainless |
Rocker Arms: | Billet Aluminum, Full Roller (Scorpion Racing or Prestige) |
Intake: | Call for options |
Oil Pan: | Street / Strip (Moroso, Canton or Champ) |
Valve Covers: | Polished Aluminum |
Power Adder: | Not Included |
Fuel Delivery: | Call for options |
Ignition: | Call for options |
Pulley Kit: | Call for options |
Dyno Testing
Dyno testing not included in long block price. Here at Prestige Motorsports, our “Dyno Promise” means that we dyno test every engine we build to verify the quality of our work, the integrity of each component, and the reliability of every engine we construct. Then, we deliver the dyno results for your project directly to you, the customer. Hours for dyno testing will be calculated with the purchase of the fuel and ignition group per engine order.
Engines will produce +/- 2% of advertised power at the flywheel. Advertised power levels are achieved using an electric water pump and specific induction and exhaust systems. Power will vary after pulley systems are installed or if changes are made to the induction or exhaust system (e.g. camshaft, cylinder head, compression, intake manifold, exhaust headers, air filters, etc.). Chassis dyno results measure power at the wheels and only calculate flywheel horsepower. Wheel horsepower is affected by a variety of vehicle-specific criteria including driveline design, body and chassis flex, air intake location, etc. Therefore, calculating flywheel horsepower from wheel horsepower is not an accurate representation of actual flywheel horsepower.

Warranty
This Prestige Motorsports engine is built to order and comes with a 3-year, unlimited miles warranty. Our warranty covers the base engine from intake manifold to oil pan.

Upgrades & Add-ons
Ready to upgrade your project? Add a kit from each area below to convert your base engine into a turn-key package. Kits come installed and dyno tested with your engine. Please note that not all of the options listed below are available for every engine. Contact us for more details.
Fuel Supply
Don’t waste time and frustration on that old carburetor. Fuel your engine with a dyno tested system for proven performance.
Quick Fuel SS-750
Starting at $637.95Quick Fuel SS-650
Starting at $637.95Holley Multi-Point EFI
Contact for OptionsSpeedmaster Stack Injection
Contact for OptionsBorla Stack Injection
Contact for Options
Ignition System
You'll need a top-notch ignition system for trouble-free performance. Let us customize one for you with everything needed to keep the spark alive.
MSD Pro Billet System
Starting at $894.95
Pulley Kits & Accessories
Pulleys drive vital components. Let us install a high-quality kit that keeps your engine running and provides max clearance for cooling systems. Available in multiple finishes!
Alternator Only
Starting at $750.00Style Track Alt + Power Steering
Starting at $1,700.00Style Track Alt + Air Conditioning
Starting at $1,850.00Style Track Alt + PS + AC
Starting at $2,200.00