350-427ci 500HP SBC Marine Crate Engines

427ci 500Hp SBC Marine Crate Engines

Marine Crate Engines from 350 to 427ci: 4.0″ bore x 3.48 stroke = 350ci,  4.125″ bore x 4″ stroke = 427ci and all in between. New direct replacements for all marine applications. Reliable power starts with new cranks, H beam rods, forged pistons, hydraulic roller cam and lifters. Dart blocks and heads are machined on our state of art Centroid 4-axis CNC machining center. This corrects all block dimensions to blue print perfect. Each engine dyno tested and tuned extensively to verify power and reliability.


9.0″ Deck | 4.0 to 4.125″ Bore | 3.48 to 4.0″ Stroke | 5.7 to 6.0″ Rods | up to 500Hp @ 5500 rpm | See Upgrades


  • Dart 31161111L or 31161211L SHP Splayed 4 Bolt Main Race Blocks
  • Manley 190,000 PSI Head Bolt Kit Plate Honed with Block
  • Brass or Stainless Steel Life Time Freeze Plug Kit Installed
  • 3.48 to 4.0″ Internally Balanced 9000 Series Cranks (see upgrades)
  • H-Beam Bushed Steel Full Floating Rods with 7/16 8740 ARP Rod Bolts
  • King “HP” Race Series Main and Rod Bearing Set
  • JE or Wiseco 9.5:1 Forged Performance Pistons (8-11 ava)
  • Total Seal Plasma Moly Ring Package
  • Comp Cams .550″ Lift Marine Hydraulic Roller Cam
  • Comp Cam or Erson Hydraulic Retro Roller Lifters
  • Cloyes Heavy Duty Double Roller Timing Set
  • Polished Aluminum Timing Cover
  • New Internally Balanced Harmonic Damper
  • Dart Iron Eagle 165cc up to 230cc Cylinder Heads
  • Dart 2.02 to 2.08 x 1.6″ Stainless Steel Valves
  • Dart Hydraulic Roller Complete Valve Train Kit
  • Fel Pro Marine Hi-Performance Gasket Set
  • Manley 5/16″ x .120″ Wall Heavy Duty Push Rods
  • Comp Cams Long Slot Roller Tip Rockers (short valve covers)
  • AwesomeEngines® CNC Engraved Powder Coated V Covers
  • Moroso Tig Welded Pick Up Oil Pump Kit
  • Moroso Marine 7qt Oil Pan
  • Motown Marine Aluminum Intake with Bronze Inserts
  • MSD Distributor, 8.5mm Plug Wires and NGK Plugs (see upgrades)
  • Holley or QFT 600 to 850cfm Marine Carburetor (see upgrades)
  • free 48 state freight (see stipulations below)

Available Upgrades

Dart Iron Eagle 180, 200, 215 and 230cc Steel Heads for 383-400-414 and 427ci Engines are Available at all the Same Price
+ $  395.00
Dart Iron Eagle 227cc Fully CNC Ported Steel Heads for 400 427ci (525+hp on 427ci engines)
+ $1095.00
Callies 3.48, 3.50, 3.75, 3.875 or 4.0″ 4340 Internally Balanced Steel Crank Upgrade for 350 to 427ci with a standard 4.000 or 4.125″ Bore Size
+ $  495.00
Comp Cams Max Hydraulic Roller Cam Package Including Beehive Springs, Tit Retainers for .550 to 600″ Lift Cam
+ $  495.00
Jesel or T&D Sportsman Shaft Rocker Systems are the Second Best Option you can Purchase and is the Perfect Valve Train Stability Upgrade Available
+ $  995.00
MSD or MSD Marine Billet Distributor with Proper Gear for Roller Cam (from)
+ $  295.00
AwesomeEngines® Custom Complete Engine Twin Engine Evacuation Installed with all Fittings, Hoses and Air Cleaner to Valve Covers
+ $  595.00
AwesomeEngines® CNC Engraved Logo Powder Coated Valve Covers with Billet Oil Fill
+ $   195.00
Properly Sized 600 to 850cfm Marine Carburetors for Cubic Inch of Engine
+ $ 695.00
The very best upgrade you can purchase for this engine is an ATI Crank Shaft Super Dampener, it works and is worth the cost
+ $ 295.00
All New Fast EZ or Holley EFI Unit Installed for the Perfect Mannered Marine Late Model Engine
+ $1695.00

Dyno Tested with Exxon 89° Pump Gas • Vacuum Pump System •HP Corrected to Sea Level

Free freight of up to $400 applies to this item shipped to any commercial address in the continental 48 states. Any charges like special handling fees, over and above insurance, residential, lift gate service, out of area charges, will apply for your zip code where you have this item shipped to. Total cost of these charges that exceed $400 will be known to you before we ship.

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