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Comp Series Chevy 421 SB
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Specification Overview4.125” Bore x 3.875” Stroke x 6.000” Rod
Operating Range 1,500 - 7,000 – Max HP 590
BASIC SHORT BLOCK
BLOCK
- Fully Blueprinted Wheeler TomahawkCR Block with ARP Main Studs
- New Dowels, Galley Plugs, 1-Piece Cam Bearings, and Brass Freeze Plugs
BALANCED ROTATING ASSEMBLY
- Wheeler Forged 4340 Connecting Rods With ARP 7/16" Capscrews
- Hastings Moly Rings With Standard Tension Oil Ring
- Forged 2-Valve Relief Flat Top, Dish or Dome (.180) Pistons With Floating Pin
- Tri-Metal Full Chamfered Race Rod And Main Bearings
- Internally Balanced, Forged, Wheeler 4340 Crankshaft
ASSEMBLY
- Complete Assembly Of Short Block, Clearanced, Inspected And Detailed
COMPLETE SHORT BLOCK
The Complete Short Block includes the Short Block above with the addition & installation of the following components:
- Camshaft, Degreed & Installed With Cam Button And Retainer Plate
- 9-Keyway Double Roller Timing Set With Torrington Bearing
- Timing Cover, Gasket & Seal
- Melling Oil Pump
- Melling Hardened Oil Pump Drive Rod
- Canton or Moroso Bolt On Pick-Up Tube Installed and Clearanced
- Canton or Moroso Race Oil Pan (Depending On Application)
- 1-Piece Oil pan Gasket
- Wheeler SFI Harmonic Balancer & Bolt
- Wheeler SFI Flexplate
- New Fasteners Throughout
- Oil Filter Adapter & Oil Filter
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