Eagle Chevrolet 305/350 Small Block 2pc Rear Seal 3.48in Stroke Internal Balance Cast MS Crank Shaft

SKU: 103503480 / UPC: 793348000602

Eagle Chevrolet 305/350 Small Block Cast Crankshaft

Engineered for pump-gas, naturally-aspirated, non-competition road cars, this crankshaft delivers unmatched durability and precision, making it the best choice for enthusiasts and builders seeking a superior stock replacement or performance upgrade. Backed by Eagle Specialty Products’ legacy of innovation since 1992, this crankshaft outperforms all competitors, offering exceptional quality at a price that outshines regrinding old cranks. Don’t settle for less—choose the industry’s top-rated crankshaft for your Chevy build and experience the difference in power and longevity.

Why Eagle?

Performance: Designed for small block Chevy 305/350 engines, the 3.48-inch stroke and internal balance ensure smooth operation and optimal power delivery, rated up to 500 horsepower for street applications.

Durability: Crafted from high-quality cast mild steel, this crankshaft undergoes magnafluxing, sonic testing, and x-ray inspection to guarantee reliability under high-performance conditions.

Precision Engineering: Features .092-inch fillet radii on rod and main journals for increased strength while maintaining compatibility with OEM-style bearings, ensuring a perfect fit and hassle-free installation.

Cost-Effective: Outperforms re-machined factory cranks at a comparable cost, delivering tighter tolerances and better metallurgy for enhanced longevity and performance.

Included:

• Eagle 103503480 Cast Steel Crankshaft:
  • Stroke: 3.480 inches
  • Rear Main Seal: 2-piece (pre-1986 design)
  • Balance: Internal
  • Rod Journal Diameter: 2.100 inches
  • Main Journal Diameter: 2.449 inches (350 mains)
  • Crankshaft Snout Size: 1.245 inches
  • Weight: Approximately 56 lbs
  • Material: Cast mild steel, non-nitrided
  • No lightening holes in rod throws
  • Provision for pilot bearing included
  • Uses two short keys for timing gear installation
• No Bearings Included: Compatible with standard 350 engine bearings (e.g., Clevite MAHLE MS909P Main Bearing Set or CB663P Connecting Rod Bearing).
• Manufacturer’s Warranty: Contact Eagle Specialty Products customer service for warranty details.

Note: Crankshaft must be balanced to match your specific rods and pistons for optimal performance. Recommended connecting rods: Eagle ESP H-Beam (CRS6200B3D) or SIR I-Beam (SIR6200B3D), 5.7 inches or longer.

Fitment

The Eagle 103503480 crankshaft is compatible with Chevrolet small block 305 (5.0L) and 350 (5.7L) engines with a 2-piece rear main seal, commonly found in pre-1986 models.

• Make: Chevrolet, GMC, Pontiac, Oldsmobile, Buick, Cadillac
• Engines: Small Block V8 305 (5.0L), 350 (5.7L)
• Years: 1968–1985 (vehicles with 2-piece rear main seal)
• Models (including but not limited to):
  • Chevrolet:
    • Camaro (1968–1985)
    • Corvette (1968–1985)
    • Chevelle (1968–1973)
    • Nova (1968–1979)
    • Impala/Caprice (1968–1985)
    • Malibu (1973–1983)
    • Monte Carlo (1970–1985)
    • El Camino (1968–1985)
    • C/K Pickup Trucks (1968–1985)
  • GMC:
    • C/K Pickup Trucks (1968–1985)
    • Sprint (1971–1977)
  • Pontiac:
    • Firebird (1968–1985)
    • GTO (1968–1974)
    • LeMans (1968–1981)
  • Oldsmobile:
    • Cutlass (1968–1985)
    • Omega (1973–1979)
  • Buick:
    • Regal (1973–1985)
    • Skylark (1968–1979)
  • Cadillac:
    • Seville (1976–1985, select models with 350 V8)

Note: Not compatible with 1986 and later engines using a 1-piece rear main seal (3.00-inch bolt circle flywheel flange). Verify your engine’s rear main seal design before purchase.