350 chevy engines with 420 Horse Power

* Engine Shown With Optional Pulley Kit*

350 Chevy

425 HP 410 ft. lbs. Torque

Chevy 350 with 425 HP engine can be custom designed to tailor to your specific needs. This engine package is what most of our customers prefer when building their hot rod. Engine can be custom painted to match your vehicle at your request. This engine is the best deal dollar for dollar. 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.

The top questions to keep in mind when purchasing your crate engine click here

"Incredible Power Throughout The Power Band"

Most Popular Engine

350 425HP Engine Live Run

Check Out What Our Customers Think Of Our Engines

See Below The Quality Of Parts We Use In Our Crate Engines

Short Block Assembly:

Seasoned factory roller 4 bolt main block 1 pc rear main seal (Upgrade to a New GM 4 bolt main Block Add $400)
Bored and honed with deck plate
Mains have been Align Honed
Block has been decked
Dura Bond bearing installed
Brass freeze plug and oil galley kit installed
Block painted with 3 coats of high temp ceramic engine paint customers choice of color
New Eagle Cast steel crankshaft
New Eagle I-Beam connecting rods with ARP bolts
Keith Black pistons
Clevite P Series rod and main bearing
Perfect Circle rings hand filed to match application
The complete rotating assembly will be balanced

Fully Dressed Crate Engine Assembly:

All The Above Plus The Following:
Three piece true double roller timing set
Custom Ground Hydraulic Roller High Performance Street Camshaft With A Muscle Car Chop
A set of Roller lifters
A Set Of Lifter Guides
A GM Roller Lifter Retainer Tray
Performance Aluminum Cylinder Heads
Stainless steel 2.02 intake valves
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
A set of stainless steel Roller Rockers
Engine will be assembled with all new bolts
High volume oil pump and screen
Chrome oil pan
Chrome dip stick and tube
Chrome timing cover
Fel-Pro performance gaskets
Professional Products performance balancer
Edelbrock aluminum Air-Gap RPM intake manifold
Chrome thermostat housing
Edelbrock carburetor w/ electric choke
14" Chrome air cleaner
MSD Pro Billet Distributor (Requires MSD 6AL Ignition Control)
MSD Blaster II coil and bracket
(8) Autolite 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
All engines will come with flex plate (for auto trans)
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 2 year unlimited mileage warranty

Only $6,450

We Are Constantly Running Engine Deals

Please Call Us For The Most Up To Date Pricing

Or E-Mail Us For More Information!

Customize Your Crate Engine

Alternator	Alternator, Power Steering	Alternator, Power Steering, And AC
Add $870	Add $1,430	Add $1,870

Holley Carburator
Holley
Add $300 Mini High Torque Starter

Add $185

MSD 6AL Ignition Control
MSD 6AL 6420
Add $225 Manual Flywheel

Add $375

The Powerjection III is an amazing accomplishment in engineering. It is by far the simplest and cleanest afermarket EFI system available. Which also means it is the easiest to install and tune. The �Adaptive Learning� feature eliminates the necessity for laptop programming and tuning, except on the most radical engines.

PowerJection III EFI System

Kit Includes:

750 CFM Throttle Body Assembly (An exact swap for a 4150 Holley)
(4) 62 lb./hr. port style injectors
Built in EMS (Engine Management System) Mounted on the throttle body
Dashboard Software CD with comprehensive Instruction Manual
All harnesses and connectors (Much less harnessing than other systems)
Idle Air Control - Built in to the throttle body
Coolant Temperature Sensor - 3/8-NPT threads for most manifolds
Throttle Position Sensor
Wideband O2 Sensor and cable (Many competitive units are narrowband)

Add $1,800

Multiport EFI System

THE WORLD'S ONLY TRUE PLUG AND PLAY FUEL INJECTION SYSTEM!
NO TUNING, NO PROGRAMMING,
NO HASSLES! UNMATCHED DRIVABILITY, INCREDIBLE FUEL ECONOMY!

Kit Includes:

Four barrel single plane Mass-Flo Patented intake manifold.
custom 1000 CFM 4 bbl throttle body
Jumbo fuel rails and mounts
custom compact high flow patented mass air meter
Complete production quality wiring harness
Production mass air sequential electronic fuel injection computer
Eight high quality fuel injectors, sized to your application
All needed sensors
High performance billet aluminum distributor complete with ignition module, rotor and cap
High performance coil featuring faster rise time and increased spark duration for increased performance
Throttle body base gasket
Throttle cable bracket
Assorted hardware and fittings and detailed instructions for a simple turn key installation

Add $2,800

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.

Add $250

Webber Stack Induction:

Webber Stack Induction Aluminum Intake Manifold
Webber 48mm IDA Carburetors
Chrome Stacks
Webber Carburetor Fuel Line
Webber Carburetor Throttle Linkage

Add $2,900

Edelbrock Dual Quad's:

Performer RPM Dual Quad Air-Gap intake With Endurashine Finish
2 Thunder Series AVS carburetors With Endurashine Finish
Progressive throttle linkage
Fuel line
Edelbrock Chrome Dual Carburetor Air Cleaner

Add $1,200

Old School Look:

One of the most popular and durable dress-up kits available today! This black crinkle kit with its distinctive look and boldly striking wording comes with everything you need for race day or show day!

Add $175

Automatic Transmission Package's:

The world�s finest transmission packages, custom made for Proformance by Monster Transmission & Performance.
-Each Transmission Package is tailored to your engine, and Test Driven to ensure maximum performance.
-They build them from Mild to Wild, if you�ve got the horsepower, they have the transmission.

TH-350 Or TH-400 Add $1,700

700R4 Or 200R4 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

Credit cards accepted

Call us today for a quote

1-732-462-7283


425HP Short Block		425HP Long Block

6300

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PROFORMANCE UNLIMITED INC. RESERVES THE RIGHT TO MAKE CHANGES IN DESIGN OR TO MAKE ADDITIONS TO OR IMPROVEMENTS UPON ANY OF ITS PRODUCTS AT ANY TIME WITHOUT INCURRING ANY OBLIGATION WHATSOEVER TO INSTALL THE SAME OR IMPROVEMENT UPON PRODUCTS PREVIOUSLY MANUFACTURED. OCCASIONALLY DEPENDING ON AVAILABILITY, PARTS MAY BE SUBSTITUTED THAT WILL NOT EFFECT PRICE, PERFORMANCE, APPEARANCE OR QUALITY OF THE PRODUCT.