BluePrint PSLS4270CTC GM 427 LS Engine, Dressed Carbureted Drop-in

  • Sale
  • Regular price $10,764.00

L92 Chevy LS V8, LS3 Chevy LS V8, 427 cu. in. Engine Displacement, Long Block Crate Engine Type
**$175 Shipping Included in Price


True Blue Power! BluePrints pro engine builders are enthusiasts just like you and it shows in the quality and performance of every engine they build. Each BluePrint crate engine is carefully dyno tested and ships with printed, proven results. If you’re looking serious horsepower at an affordable price, BluePrint Engines is the choice for you!

GM 427 LS Series - Dressed Carbureted Drop-in - Aluminum Heads


  • HP & Torque: 625 HP / 550 FT LBS
  • Compression Ratio: 11.0:1
  • Aluminum Heads
  • Forged Pistons
  • Roller Cam
  • Forged Crank
  • Part #: PSLS4270CTC


  • New GM LS3/L92 Aluminum Block!

Rotating Assembly

  • Forged Steel Crankshaft
  • Forged Mahle Pistons
  • Forged I beam rods
  • Mahle performance rings
  • Balanced Rotating Assembly
  • Hydraulic roller cam
  • Premium single true roller timing set
  • GM factory roller rockers with upgraded full roller trunion

Cylinder Heads

  • New BluePrint Aluminum Cylinder Heads - PS8015
  • Chrome moly retainers and spring locators
  • 2.165 intake valves
  • 1.590 exhaust valves
  • Hardened push rods

Cam Specs

  • Roller - .624 intake .624 exhaust lift, 247 intake 263 exhaust duration @ .050, 114 degree lobe sep.

Ignition Timing

  • Ignition box required

Also Includes

  • Carburetor “ 850cfm with mechanical secondaries, dual accelerator pumps and mechanical choke
  • Single plane aluminum intake
  • Harmonic balancer
  • Valve covers, retro fit oil pan and timing cover
  • Coil Packs and coil pack harness
  • Crank, cam and MAP sensors
  • Spark plug wires & wiring harness
  • Dyno tested & shipped with results


  • 30 month / 50,000 mile


This engine requires a non-weighted flexplate/flywheel.Recommended Fuel: 91 OctaneBluePrint Engines recommends a 2200+ RPM stall converter.Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars


Recommended oil for your BluePrint Crate Engine: 10W30, Non-Synthetic, Not for EGR Also includes sensors and coil packs. If requested, BluePrint Engines can provide a base map and timing curve.
Some parts are not legal for use in California or other states with similar laws/regulations