427W Crate Sniper EFI Engine W/4R70W Automatic Trans FFR Hot Rod / Mustang


The 427w / 540 HP Crate Engine is the Biggest and Baddest of our Windsor Class engines. Brute Torque with a classic Muscle car thump! All Forged internals.  Ideal for a FFR MKIV or early Mustang.  The 4R70W  overdrive gear reduces the RPMs considerably from an early C4 .  4 Bolt Main Block Forged Steel Crank, Steel Beam Rods,  Roller Camshaft, Roller Valvetrain.  Aluminum Cylinder Heads Flow exceptionally better than the old Iron Heads.  Classic Thump Idle sound.   Sniper EFI. Pump Gas Friendly Pump Gas Friendly – 91 octane and up.   ***Currently in Stock.


Precision machined 351w new 4 bolt dart roller block
Eagle forged steel 4340 crankshaft
Steel h beam connecting rods with 190, 00 psi arp bolts
Mahle power forged pistons 10.5 to 1 compression
Perfect circle chrome moly piston rings
3 piece steel double roller style timing chain
Hyd roller xtreme energy camshaft huge torque
New melling oil pump and screen
Aluminum Performance Cylinder Heads. 60cc Combustion Chambers with Bronze Guides
2.05 stainless steel swirl polished intake valves
1.60 stainless steel swirl polished exhaust valves
Comp cams xtreme duty roller rockers
Hard seats for unleaded or regular fuel
Heavy duty 1.55 diameter valve springs, 7 degree locks
New heavy duty chrome moly push rods
New 7 quart large capacity low profile oil pan
Timing chain cover with scale
427 black wrinkled aluminum valve covers or Equiv.
164 tooth Automatic Flexplate.
Edelbrock RPM intake manifold or Equiv.
Sniper EFI 2 with Controller, Harness and Sensors

Electronic Billet ignition distributor. 1 wire hook-up 45,000 volt coil
90 degree thermostat housing & 180 degree thermostat
8mm accel silicone wires
High flow water pump
Dip tube and dipstick
Video footage shown of your engine 
Blue printed, balanced,
assembled by ase technicians
Engine Midplate
Stage 3 4R70W 4 Speed Automatic Overdrive Transmission with matching  Billet Torque Converter
Includes Controller built within Sniper EFI 2
High Torque Starter
Crating and packaging



  • Siamesed Cylinders: Standard  4.125” cylinders. Extra-thick walls prevent cracking and produce excellent ring seals.
  • Scalloped Water Jackets: Increase coolant flow around cylinder barrels to prevent detonation, extend engine life, and produce consistent cylinder temperatures.
  • Steel Four-Bolt Main Bearing Caps: Sportsman Blocks have three 4-bolt center caps with splayed outer bolts for maximum strength, Race Blocks feature all five 4-bolt mains, rear cap uses a standard 1-piece seal.
  • Stock Components: Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans, and pumps.
  • Upgraded Oiling System: Has a complete stock-type system plus a low-tension priority main oiling system with front and rear external oil pump feeds.
  • Dual Crossovers: Allow oil flow to be metered with restrictors for roller lifter cams and/or roller rocker arms to reduce oil flow and windage.
  • Reinforced Head Bolt Bosses: Blind-tapped to prevent leaks and produce accurate torque readings. Extra-thick decks prevent head gasket leaks.
  • Standard Camshaft and Cam Drive: Standard cam and cam drive can be used. Lifter Valley of Sportsman Blocks has provisions for the production of hydraulic roller lifters.
  • Precision CNC Machining: Ensures consistent high quality and eliminates expensive ”blueprinting”.


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