Chevy 427 LS7 Aluminum Power Adder Long Block
LS Series

Chevy 427 LS7 Aluminum Power Adder Long Block

Chevy 427 LS7 Aluminum Power Adder Long Block Priced As Shown
427 LS7 S/C
Dyno Tested
Long Blocks

New Configurations! The Perfect Long Block For The Supercharged/Turbo LS Enthusiast! Engineered For Up To 20 lbs Of Boost.

Brand New GM LS7 Aluminum Block Combined With Your Choice Of 4340 Forged Steel Crank And 4340 Forged Steel H-Beam Rods With ARP Bolts. Forged 2618 Aluminum Pistons And Premium Rings Specifically Designed For Turbo And Boost Applications Complete This High Quality Build. Every Short Block Is Machined, Balanced, Clearanced And Hand Fitted By Our Experienced Team Of Race Engine Builders.

  • Bore & Stroke
  • Compression Ratio
  • 4.125 x 4.000
  • 9.5 to 1



Supercharged / Turbo / Nitrous

Stage I

Rated For Up To 1000 HP

  • GM LS7 Aluminum Block w/6 Bolt Caps (1)
  • GM Main Studs
  • Callies/Compstar 4340 Full Counterweight Crank (2,3,4)
  • Callies/Compstar 4340 Forged Steel Rods
  • ARP 2000 Rod Bolts
  • CP/Carillo 2618 Forged Aluminum Pistons
  • Heavy Wall Wrist Pins
  • 1.5/1.5/3.0MM Premium Ring Set
  • (Gas Nitrided Top Ring / Napier 2nd)
  • Clevite 77 H-Series Main & Rod Bearings
  • Internally Balanced w/Mallory Heavy Metal
  • Professionally Blueprinted and Assembled
  • SSRE/Comp Custom Grind Hydraulic Cam
  • Hi-Rev Hydraulic Roller Lifters
  • Rollmaster Billiet Timing Set w/IWIS Chain
  • ATI Super Damper Harmonic Balancer

  • Trick Flow GenX 260 LS7 Heads
  • Fully CNC Ported
  • 2.200"/1.600" 8mm Stainless Bead Lock Valves
  • PAC Racing Hydraulic Roller Springs
  • 7° Bead Lock Titanium Retainers
  • GM LS7 Rockers Arms w/Bushed Trunions
  • Chromemoly 3/8 .080" Wall Pushrods
  • Cometic MLS Head Gaskets
  • ARP Head Stud Kit

  • GM Aluminum Front & Rear Cover w/Seal
  • GM Aluminum Valley Cover
  • Melling Race Prepped Oil Pump
  • GM Muscle Car Oil Pan w/Windage Tray
  • Holley Valve Covers w/Coil Bosses
  • Individually Dyno Tested With Carb & Intake
$ 15,295

Stage II

Rated For Up To 1200 HP

  • GM LS7 Aluminum Block w/6 Bolt Caps (1)
  • ARP Main Studs
  • Callies/Compstar 4340 Full Counterweight Crank (2,3,4)
  • Molnar Severe Duty 4340 Forged Steel Rods
  • ARP 2000 Symmetrical Rod Bolts
  • Diamond L2K 2618 Forged Aluminum Pistons
  • H13 Steel Wrist Pins
  • 1.5/1.5/3.0MM Premium Ring Set
  • (AP Steel Top Ring / Napier 2nd Ring)
  • Clevite 77 H-Series Main & Rod Bearings
  • Internally Balanced w/Mallory Heavy Metal
  • Professionally Blueprinted and Assembled
  • SSRE/Comp Custom Grind Hydraulic Cam
  • Hi-Rev Hydraulic Roller Lifters
  • Rollmaster Billiet Timing Set w/IWIS Chain
  • ATI Super Damper Harmonic Balancer

  • Trick Flow GenX 260 LS7 Heads
  • Fully CNC Ported
  • 2.200"/1.600" 8mm Stainless Bead Lock Valves
  • PAC Racing Hydraulic Roller Springs
  • 7° Bead Lock Titanium Retainers
  • GM LS7 Rockers Arms w/Bushed Trunions
  • Chromemoly 3/8 .080" Wall Pushrods
  • Cometic MLS Head Gaskets
  • ARP Head Stud Kit

  • GM Aluminum Front & Rear Cover w/Seal
  • GM Aluminum Valley Cover
  • Melling Race Prepped Oil Pump
  • GM Muscle Car Oil Pan w/Windage Tray
  • Holley Valve Covers w/Coil Bosses
  • Individually Dyno Tested With Carb & Intake
$ 16,095

Stage III

Rated For Up To 1500 HP

  • GM LS7 Aluminum Block w/6 Bolt Caps (1)
  • ARP Main Studs
  • Dragonslayer 4340 Forged Steel Crank (2,3)
  • Callies Ultra-H 4340 H-Beam Steel Rods
  • Callies/ARP Ultra Bolts
  • Diamond L2K 2618 Forged Aluminum Pistons
  • H13 Steel Wrist Pins
  • 1.5/1.5/3.0MM Premium Ring Set
  • (AP Steel Top Ring / Napier 2nd Ring)
  • Clevite 77 H-Series Main & Rod Bearings
  • Internally Balanced w/Mallory Heavy Metal
  • Professionally Blueprinted and Assembled
  • SSRE/Comp Custom Grind Hydraulic Cam
  • Hi-Rev Hydraulic Roller Lifters
  • Rollmaster Billiet Timing Set w/IWIS Chain
  • ATI Super Damper Harmonic Balancer

  • Trick Flow GenX 260 LS7 Heads
  • Fully CNC Ported
  • 2.200"/1.600" 8mm Stainless Bead Lock Valves
  • PAC Racing Hydraulic Roller Springs
  • 7° Bead Lock Titanium Retainers
  • GM LS7 Rockers Arms w/Bushed Trunions
  • Chromemoly 3/8 .080" Wall Pushrods
  • Cometic MLS Head Gaskets
  • ARP Head Stud Kit

  • GM Aluminum Front & Rear Cover w/Seal
  • GM Aluminum Valley Cover
  • Melling Race Prepped Oil Pump
  • GM Muscle Car Oil Pan w/Windage Tray
  • Holley Valve Covers w/Coil Bosses
  • Individually Dyno Tested With Carb & Intake
$ 17,395
  • Footnotes:
  • (1) Plate Honed w/SSRE Sunnen Diamond Equipment
  • (2) 58T Reluctor Wheel Standard. 24T Reluctor Wheel Available At No Extra Charge
  • (3) Available With LS7 Dry Sump Style Longer Crank Snout For An Additional $150
  • (4) Fully Center Counterweight Design
Blocks
Drill & Tap Block For 1/2" Head Bolt Holes. $300
ARP Main Stud Kit (Installed Before Machine Work) $295
Pistons - Pins - Rings - Bearings
Custom Compression Ratios Available $Call
Oil Pumps - Oil Pans - Vacuum Pump
GM Vehicle Specific Oil Pan $Call
Holley Muscle Car Retrofit 6 Quart Oil Pan Includes Custom GM Full Length Windage Tray and Holley "Road Race" Baffle Kit $465
Moroso Street/Strip 7 Quart Welded Steel Oil Pan Includes Custom GM Full Length Windage Tray and Baffle KitImage Close$335
Additional Parts - Labor - Accessories
ARP 1/2" Head Stud Kit (15 Bolt Heads) $395
Master Power Silent Drive Vacuum Pump Kit For Power BrakesImage Close$589
Ignition Package Includes: (8) Coil Packs, Spark Plug Wires, Cam Sensor, Crank Sensor w/Engine Wiring Harnesses $895