By The Numbers

426ci LS Chevy

Block: 6.0L LS iron truck, overbored .060 inch

Bore: 4.06 inches

Stroke: 4.10 inches

Displacement: 424.6 ci

Compression ratio: 11.5:1

Crankshaft: Manley, standard weight

Camshaft: Bullet hydraulic roller

Timing chain: Cloyes

Lifters: COMP limited-travel hydraulic

Pushrods: COMP Cams 7.500-inch (3/8-inch diameter)

Springs: Beehive

Installed height: 1.85 inch

Spring load, closed: 160 pounds on the seat

Spring load, open: 410 pounds at 1.160-inch lift

Retainers: Manley 7-degree steel

Valve locks: Manley 7-degree beadlock

Duration, intake: 237 degrees at .050

Intake lift: .648 inch

Duration, exhaust: 237 degrees at .050

Exhaust lift: .648 inch

Rockers: Harland Sharp

Rocker ratio: 1.8/1.8

Lobe separation: 104 degrees

Installed centerline: 102 degrees

Ring pack: Total Seal; 1.5mm, 1.5mm, 3.0mm oil

Ring endgap: .017-inch top, .026-inch second

Piston: Manley forgings with coated skirts, custom tops

Piston clearance: .006 inch

Main studs: ARP

Rods: Eagle 6.125-inch H-beam

Main bearings: Clevite H

Rod bearings: Clevite HN

Main journal diameter: OEM

Rod journal diameter: 2.100 inches

Main clearance: .0025 inch

Rod clearance: .0024 inch

Cylinder heads: GM LS7

Head bolts: ARP studs

Intake manifold: Mast Motorsports two-piece

Intake port flow: 352 cfm at .550-inch lift

Exhaust port flow: 254 cfm at .550-inch lift

Intake valve: Manley stainless 2.200 inch

Exhaust valve: Manley stainless 1.540 inch

Cylinder head gaskets: Fel-Pro 1041 (.041 inch)

Piston/head clearance: .019 inch

Engine gaskets: OEM

Throttle body: 114mm TPIS

Fuel rails: FAST

Injectors: FAST 36 lb/hr

Header: Schoenfeld 1.750-inch diameter with 3-inch merge collector

Coils: MSD

Ignition: FAST XIM

Spark plug wires: Champion

Damper: ATI with 10 percent underdrive steel hub with aluminum shell

Water pump: Meziere electric

Oil pan: stock 6.0 truck

Oil pump: Melling Select

Oil: AMSOIL 5W/30

SOURCE
Federal Mogul/Fel-Pro/Speed-Pro
800-560-1400
www.federal-mogul.com
Racing Engine Design (R.E.D)
117 Smokey Street
Ft. Collins
CO  80525
970-226-6040
www.racingenginedesign.com
AMSOIL
925 Tower Ave.
Superior
WI  54880
800-777-8491
www.amsoil.com
Bullet Cams
8785 Old Craft Road
Olive Branch
MS  38654
662-893-5670
www.bulletcams.com
ARP
1863 Eastman Avenue
Ventura
CA  93003
800-826-3045
www.arp-bolts.com
Pac Racing
21200 Telegraph
Southfield
MI  48034
866-799-9417
http://www.racingsprings.com/
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
www.compcams.com
Harland Sharp
19769 Progress Dr.
Strongsville
OH  44149
440-238-3260
http://www.harlandsharp.com
Manley Performance Products
1960 Swarthmore Avenue
Lakewood
NJ  08701
732-905-3366
www.manleyperformance.com
Schoenfeld Headers
479-474-7529
http://www.schoenfeldheaders.com
Eagle Specialty Products (Rotating Assy.)
662-796-7373
http://www.eaglerod.com
Cloyes
Fort Smith
AR
479-645-1662
www.cloyes.com
MAHLE Clevite
7670 Hacks Cross Road
Olive Branch
MS  38654
662-893-2860
www.mahleclevite.com
ATI Racing
6747 Whitestone Road
Baltimore
MD  21207
1-877-298-5039
http://www.atiracing.com
Mast Motorsports
330 NW Stalling Drive
Nagodoches
TX  75964
866-551-4916
http://www.mastmotorsports.com
MSD
915-857-3344
www.MSDIgnition.com
Melling Engine Parts
2620 Saradan Dr
PO Box 1188
Jackson
MI  49204
517-787-8172
www.melling.com
FAST
3400 Democrat Road
Memphis
TN  38118
877-334-8355
www.fuelairspark.com
Total Seal Inc
22642 North 15th Avenue
Phoenix
AZ  85027
800-874-2753
www.totalseal.com
TPIS
952-448-6021
www.TPIS.com
Meziere Enterprises
220 S. Hale Ave.
Escondido
CA  92029
800-208-1755
www.meziere.com