ATK High Performance Engines VCH4 Remanufactured 350ci 5.7L Vortec V8 Crate Engine

The ATK High Performance Engines VCH4 is a remanufactured long block crate engine built to OEM specifications for the Chevrolet and GMC 350ci (5.7L) Vortec V8. Designed as a direct-fit stock replacement, this engine delivers factory-matched horsepower and torque output with upgraded internal components for long-term durability and reliability.

This is a distributorless engine — the crank sensor mounts to the timing cover, making it a direct match for the factory EFI system used in these applications. Head casting numbers 2R/3RZFE and block casting number 3RZ confirm proper OEM fitment.

Key Features:

• 350ci / 5.7L Small Block Chevy Vortec V8 — remanufactured to OE specifications
• Cast iron Vortec cylinder heads with 64cc combustion chambers
• Hydraulic roller camshaft (.414" intake / .428" exhaust lift)
• OE remanufactured powder metal connecting rods (5.7" length)
• Hypereutectic pistons with moly piston rings
• OE reground crankshaft (3.480" stroke)
• Head Cast #: 2R/3RZFE | Block Cast #: 3RZ
• No distributor — crank sensor mounts to timing cover (EFI-ready)
• Pre-installed harmonic balancer, oil pan, and timing cover
• Does not include mechanical fuel pump provisions

Break-In Requirements:

• Use conventional (non-synthetic) oil for the first 600 miles
• Vary engine speed during break-in — avoid prolonged steady-state driving
• Change oil and filter at 600 miles; synthetic oil may be used after 5,000 miles

Backed by ATK's industry-leading remanufactured engine warranty, the VCH4 is a proven stock-replacement solution for owners looking to restore factory performance with confidence. A core return is required at time of purchase.