Small block Ford 302 stroker engine combination with Aluminum heads. The 347 425 HP engine package can be custom designed to tailor to your specific needs. This engine package delivers a lot of punch for your money.  This is what most of our customers prefer when building there strip/street car. All engines can be custom painted to match your vehicle at your request. We can outfit your engine with the exclusive March Performance serpentine belt system.  We can also assist you in choosing the proper transmission and stall speed converter combination for your vehicle and have it shipped directly to you as your performance crate engine is being built.

347 425HP  Engine Live Run 

Check Out What Our Customers Think Of Our Engines

• A Precision Machined 302 Roller Block Painted Color Of Choice (New Sportsman 302 Roller Block Add $800)
• Eagle Cast Steel Stroker Crankshaft
• Eagle I-Beam Bushed Connecting Rods With ARP Hardened Rod Bolts
• Tri Metal Clevite 77 Rod And Main Bearings
• Set Of Keith Black Flat Top Pistons W/ A Single Valve Relief
• Hand Filled Performance Rings To Match
• Three Piece True Double Roller Timing Set
• A Hand Selected Performance Camshaft To Achieve The Idle & Throttle Response To Customers Desire.
• (16) High Rev Lifters (Anti-Pump Up)
• Dart Aluminum Performance Cylinder Heads, With 62cc Combustion Chambers And 195CC Intake Runners.
• (8) Stainless Steel 2.02 Intake Valves
• (8) Stainless Steel 1.60 Exhaust Valves
• (16) High Performance Valve Springs And Retainers (To Match Camshaft)
• 7/16 Screw In Studs And Hardened Guide Plates
• All New ARP Head Bolts
• Chrome Moly Push Rods
• (16) 1.6 Ratio True Aluminum Roller Rockers
• Melling High Volume Oil Pump
• Chrome front sump oil pan, and dip stick (additional $150 for rear or double sump oil pans)
• Timing Cover With Scale
• Engine Will Be Assembled With All New Bolts
• Edelbrock Aluminum Air-Gap RPM Intake Manifold
• Chrome Thermostat Housing To Match Intake
• Edelbrock Carburetor W/ Electric Choke  (Upgrade To A Holley Or Demon For $300)
• 14" Chrome Air Cleaner
• MSD Pro-billet distributor (Requires MSD 6AL ignition control)
• MSD Blaster II Coil
• MSD Coil Bracket
• (8) AC Delco Spark Plugs
• A Set Of Custom Fit Taylor 8mm Ignition Wires (Color Of Choice Black, Red, Blue, Yellow, Green, Orange No Extra Charge)
• Fuel Pump W/Inline Filter
• Hi-Flow Water Pump
• Chrome Valve Covers With Baffles
• Professional Products Performance Balancer
• Fel-Pro Blue Performance Gaskets

• Engines will come with flex plate (for auto trans) additional $200 for manual transmissions. As we assemble your engine we take several pictures throughout the building process. And then we send them to you via e-mail, so you can see the quality of parts and workmanship that goes into your engine.

• Each engine is live run tested timing set, carburetor adjusted for optimum performance.

• We video tape your live run engine, and send you a copy.

All of our turn-key crate engines come with a 1 year warranty with unlimited mileage

March Performance

Alternator Serpentine Kit

Add $870 To Base Price

March Performance

Alt, & PS Serpentine Kit

Add $1,430  To Base Price

March Performance

Alt, PS, & AC Serpentine Kit

Add $1,870 To Base Price

Whether your vehicle is a hot rod, street car, race car, or even a tow truck, here at Pro-formance Unlimited we are here to help design and build the combination that best suits your vehicles needs. Please browse our engine combinations listed below or custom design one of your own. Pro-formance Unlimited is best known for our precision custom designs. From that special built stroker engine to that turn-key drop in ready crate engines, call Doug or Steve we will be happy to answer any of your questions.

All engines are custom built to order for total customer satisfaction

All major credit cards accepted

Call us today for a quote

1-800-267-3940

425HP Short Block

425HP Long Block