383 with 450 HP stroker engine has a 3.750 stroke which delivers an extremely high amount of torque, you have to experience one to know how it feels.  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. Engine can be custom painted to match your vehicle at your request. We can also equip 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.

• 4 Bolt Main Block (One Or Two Piece Rear Seal)
• Scat Cast Steel Stroker Crankshaft (W/Tri Metal Clevite 77 Bearings)
• Set Of Eagle I-Beam Bushed Connecting Rods W/ARP Rod Bolts
• High Performance Speed-Pro Pistons
• Hand Filed Performance Rings
• Three Piece True Double Roller Timing Set
• Hand Selected Performance Camshaft To Achieve The Idle & Throttle Response To Customers Desire
• (16) New High Rev Lifters (Anti-Pump up)
• Dart Performance Aluminum Cylinder Heads 64cc With 200cc 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
• (16) Chrome Moly Push Rods

• (16) Performance true aluminum roller rockers

• 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 Performer RPM Or Air Gap Intake Manifold Customers Choice
• Chrome Thermostat Housing
• 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 And Bracket
• (8) AC Delco Spark Plugs
• Custom Fit Taylor 8mm Ignition Wires (Color Of Choice Black, Red, Blue, Yellow, Green, Orange No Extra Charge)
• High Flow Cast Iron Water Pump
• Chrome Valve Covers
• Chrome Breather
• 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 turnkey engines come with a 1 year warranty with unlimited mileage

March Performance Deluxe

Alt, & AC Serpentine Kit

Add $2,200

March Performance Deluxe

Alt, PS & AC Serpentine Kit

Add $2,450

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

450HP Short Block

450HP Complete