Big block Chevy 454 with 550 Hp performance aluminum head engine combination can be custom designed to tailor to your specific needs. 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.

454 550HP Engine Live Run  

Check Out What Our Customers Think Of Our Engines

• 454 Chevy Block (One Or Two Piece Rear Seal)
• Cast Iron Precision Ground Crank Assembled W/Tri Metal Clevite 77 Rod And Main Bearings
• I-Beam Connecting Rods W/ARP Rod Bolts
• Keith Black Performance Pistons
• Hand Filed Performance Rings
• Three Piece True Double Roller Timing Set
• A Hand Selected Performance Camshaft To Achieve The Idle & Throttle Response To Customers Desire
• (16) New High Rev Lifters (Anti-Pump up)
• Edelbrock Or Dart Aluminum Performance Cylinder Heads W/Screw In Studs And Guide Plates
• (16) Chrome Moly Push Rods
• (16) Performance True Aluminum Roller Rocker Arms
• Engine Will Be Assembled With All Brand New Bolts
• High Volume Oil Pump And Screen
• Chrome Oil Pan
• Chrome Dip Stick And Tube
• Chrome Timing Cover
• Professional Products Performance Balancer
• Fel-Pro Performance Gaskets
• The Complete Rotating Assembly Will Be Balanced
• Edelbrock RPM Air-Gap Intake Manifold
• Chrome Thermostat Housing
• Edelbrock Carburetor W/ Electric Choke  (Upgrade To A Holley Or Demon For $300) 
• Chrome Air Cleaner
• MSD Pro-Billet Distributor
• MSD Blaster II Coil And Bracket
• MSD 6AL Ignition Control
• (8) AC Delco Spark Plugs
• Custom Fit Taylor 8mm Ignition Wires (Color Of Choice Black, Red, Blue, Yellow, Green, Orange No Extra Charge) 
• Brand New High Flow Cast Iron Water Pump
• Chrome Valve Covers
• Chrome Breather
• A Complete PCV Ventilation System

• All engines will come with starter and flex plate (for auto trans), additional $200 for manual transmissions.

• Engines are photo documented during the building process so you can see the quality of parts and workmanship that goes into your engine.

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

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

All of our engines come with a 1 year warranty with unlimited mileage

454 550HP With March

Alternator Serpentine Kit

Add $880 To Base Price

454 550HP With March

Alt, & PS Serpentine Kit

Add $1,430 To Base Price

454 550HP With March

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

550HP Short Block

550HP Long Block