Hawks Motorsports offers the BluePrint Engines B598K4L8 GM Big Block Compatible 598 C.I. Builder Series Engine and 4L80E Automatic Transmission Package, combining massive big-block horsepower with the convenience of a complete drivetrain solution. Producing 741 horsepower and 703 lb-ft of torque, this carbureted 598 cubic inch package is designed for enthusiasts who want a powerful, reliable, and street-friendly combination ready for high-performance builds.

The Builder Series 598 C.I. big block features a high-strength cast iron block, forged rotating assembly, BluePrint aluminum cylinder heads, hydraulic roller camshaft, and a precision-machined foundation designed for serious street and strip performance. The combination of a 4.600" bore, 4.500" forged crankshaft, forged pistons, and forged 6.480" connecting rods provides the durability and torque expected from a large-displacement big block Chevy-style engine.

This Standard Edition Builder Series package includes a carbureted engine paired with a complete 4L80E automatic transmission package, providing overdrive cruising capability, electronic control, lockup functionality, and a high-stall torque converter. The polished pulley kit adds a premium appearance while providing a complete accessory drive system with alternator, A/C compressor, power steering pump, and water pump.

Designed for classic muscle cars, street rods, trucks, and custom performance builds, the B598K4L8 delivers old-school big-block attitude with modern drivetrain convenience.

Key Features:

• SKU: B598K4L8
• GM Big Block Compatible 598 C.I. Engine Package
• Complete Engine + 4L80E Automatic Transmission Combo
• 741 Horsepower
• 703 lb-ft Torque
• Standard Edition Builder Series
• Carbureted configuration
• Polished pulley/accessory kit
• BluePrint high-strength cast iron block
• Manufactured and machined in the USA
• Standard deck block
• 4-bolt main block
• 1-piece rear main seal
• Mechanical fuel pump provision
• 4.600" Bore
• 4.500" Stroke
• Forged crankshaft
• Forged pistons
• Forged 6.480" connecting rods
• Internally balanced rotating assembly
• 10.5:1 Compression Ratio
• BluePrint aluminum cylinder heads
• Hydraulic roller camshaft
• Pro Series Ready-to-Run distributor
• 1250 CFM Holley carburetor
• Electric fuel pump
• Aluminum intake manifold
• Harmonic balancer included
• Timing cover installed
• Valve covers installed
• Oil pan installed
• Oil pump installed
• Spark plugs included
• Spark plug wires included
• Thermostat and housing included
• Polished pulley kit includes:
  • Reverse rotation short water pump
  • 140-amp one-wire alternator
  • Peanut-style A/C compressor
  • Type II power steering pump with remote reservoir

Transmission Package Includes:

• Complete 4L80E automatic transmission
• Electronic transmission controller included
• Lockup capability
• 3800+ stall torque converter
• Flexplate included
• Starter included
• Gear ratios:
  • 1st: 2.482
  • 2nd: 1.482
  • 3rd: 1.000
  • 4th: 0.750
  • Reverse: 2.077

Fitment Applications:

Designed for custom GM Big Block compatible applications:

• Chevrolet Camaro
• Chevrolet Chevelle
• Chevrolet Nova
• Chevrolet Corvette
• Chevrolet El Camino
• Chevrolet Impala
• Chevrolet C10 / C20 / C30 Trucks
• Street rods
• Restomod builds
• Pro Touring vehicles
• Classic muscle cars
• Custom hot rods
• Street/strip applications

Verify engine bay clearance, transmission tunnel clearance, driveshaft length, crossmember requirements, accessory clearance, and vehicle-specific fitment before installation.

Installation Notes:

• Complete engine and transmission package.
• Carbureted setup requires compatible fuel system.
• 4L80E transmission requires proper wiring integration and electronic controller installation.
• Requires compatible driveshaft and transmission crossmember.
• Torque converter stall speed: 2500-2800 RPM operating range.
• Requires compatible exhaust headers.
• Front accessory drive is designed to fit many applications; verify clearance for power steering hoses, alternator wiring, and additional fittings.
• Recommended fuel: 91+ octane.
• Professional installation and tuning recommended.