Hawks Motorsports offers the BluePrint Engines B598FK4L8 GM Big Block Compatible 598 C.I. Builder Series Engine and 4L80E Automatic Transmission Package, combining massive big-block performance with modern electronic fuel injection and overdrive cruising capability. Producing 741 horsepower and 703 lb-ft of torque, this complete drivetrain package is designed for enthusiasts who want serious street performance, reliable power, and a clean installation solution for custom builds.

The 598 C.I. Standard Edition Builder Series engine features a high-strength cast iron GM Big Block compatible block, BluePrint aluminum cylinder heads, hydraulic roller camshaft, forged crankshaft, and forged pistons. With a 4.600" bore, 4.500" stroke forged crankshaft, and forged 6.480" connecting rods, this engine delivers the massive torque and durability expected from a high-performance big block combination.

This package pairs the powerful fuel-injected 598 cubic inch engine with a 4L80E automatic transmission, providing electronic overdrive, lockup capability, and improved highway cruising compared to traditional three-speed automatic transmissions. The polished pulley kit adds a premium appearance while providing a complete accessory drive system for a clean, show-quality engine bay.

The B598FK4L8 is ideal for classic muscle cars, Pro Touring builds, street rods, trucks, and custom performance vehicles where big-block horsepower meets modern drivability. Each BluePrint engine is professionally machined, assembled, and dyno tested before shipment.

Key Features:

• SKU: B598FK4L8
• 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
• Fuel Injected Configuration
• Polished Pulley / Accessory Kit
• High-strength cast iron block
• Manufactured and machined in the USA
• Standard deck block
• 4-bolt main design
• 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
• Fuel injection system
• Aluminum intake manifold
• Ready-to-Run distributor
• Harmonic balancer installed
• 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:

• Polished accessory drive system
• Alternator
• A/C compressor
• Power steering pump
• Water pump

Transmission Package Includes:

• Complete 4L80E automatic transmission
• Electronic transmission controller
• Lockup capability
• High-performance torque converter
• Flexplate included
• Starter included
• Overdrive gear for highway cruising

4L80E Gear Ratios:

• 1st Gear: 2.482
• 2nd Gear: 1.482
• 3rd Gear: 1.000
• 4th Gear: 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, fuel system compatibility, and accessory clearance before installation.

Installation Notes:

• Complete engine and transmission package.
• Requires compatible EFI fuel system and wiring integration.
• 4L80E transmission requires electronic controller installation.
• Requires compatible transmission crossmember and driveshaft modifications in many applications.
• Torque converter designed for performance street applications.
• Requires compatible exhaust headers.
• Verify accessory bracket and hose clearance before installation.
• Recommended fuel: 91+ octane.
• Professional installation and tuning recommended.