ATK Chevy 383 Stroker 470HP HP101M Mid-Dress Engine

Description

Replacing tired classic truck motors requires the ATK Chevy 383 Stroker 470HP HP101M Mid-Dress Engine and its massive 490 lb-ft of torque. Experience aggressive throttle response during weekend car shows. This build utilizes a seasoned GM four-bolt main casting to deliver reliable street muscle instantly.

Engine Architecture & Core Specifications

• Block Material: Seasoned GM cast iron with 4-bolt mains and passenger side dipstick.
• Cylinder Heads: Dart SHP aluminum 72cc chamber with 2.02/1.60 valves.
• Compression Ratio: 10.0:1 advertised compression ratio.
• Bore & Stroke: 4.030 inch bore x 3.750 inch stroke (383 CID / 6.3L).
• Rotating Assembly: Scat nodular iron crankshaft with forged pistons and 4340 forged I-beam rods.

Component Breakdown: Mid-Dress Long Block

Upgrading the factory block involves utilizing robust forged components designed specifically to withstand elevated horsepower levels.

• Dart SHP aluminum cylinder heads feature large intake valves to improve thermal efficiency while the included billet aluminum roller rockers minimize valvetrain friction.
• A heavy duty Scat rotating assembly prevents catastrophic bending under heavy torque loads and an original style five quart oil pan keeps the bottom end properly lubricated.

Vehicle Fitment & Compatibility Matrix

Designed for classic Chevrolet architectures this mid-dress engine drops perfectly into vintage chassis. Dropping in one of our premium Chevy stroker engines modernizes the powertrain of your classic restoration instantly.

• Fits 1967-1981 Chevrolet Camaro models.
• Fits 1964-1972 Chevrolet Chevelle platforms.
• Fits 1968-1974 Chevrolet Nova chassis.
• Fits 1973-1987 Chevrolet C10 pickup trucks.
• Fits 1968-1982 Chevrolet Corvette models.

Fuel & Ignition System Requirements

Supplying adequate fuel volume to this high output stroker engine requires proper carburetion and ignition tuning.

• A high flow carburetor and dual plane intake manifold are highly recommended while utilizing 91 Octane premium pump gas is strictly required to prevent detonation.
• Spark plugs must be correctly gapped to 0.035 inches to ensure consistent ignition alongside a quality HEI distributor upgrade.

Installation, Break-In Oil & Priming Instructions

Executing a flawless installation demands meticulous attention to fluid dynamics and proper heat cycling.

• Transfer your existing intake manifold using fresh gaskets before manually priming the oil system with 10W30 break in oil until pressure is verified.
• Perform a varied RPM heat cycle before changing the oil and driving conservatively for the first 500 miles.

USA Warranty, Emissions & Logistics

Securing this performance upgrade involves strict adherence to federal emissions regulations and proper installation practices.

• Backed by a 24-Month or Unlimited-Mile warranty this package demands documented professional installation to qualify for assembly defect guarantees.
• Carrying a Race Use Only designation this crate ships via LTL freight carrier and requires a signature alongside liftgate capabilities upon delivery.