The massive internal displacement of the ATK Ford 408 Stroker 430 HP HP21M Stage 2 Mid-Dress LB delivers commanding highway passing power. Accelerate high-horsepower restomod projects with pre-installed induction hardware. This build utilizes a durable cast iron block to anchor moderate performance upgrades reliably.

Key Features of ATK Ford 408 Stroker 430 HP HP21M

- Block Material: Cast iron Ford Windsor Small Block resists thermal fatigue and provides a stable foundation for the internally balanced rotating assembly.
- Cylinder Heads: High-performance aluminum cylinder heads manage intense combustion temperatures effectively while reducing front end weight.
- Compression Ratio: A 10.0:1 advertised compression ratio ensures crisp throttle response and massive mid range torque.
- Rotating Assembly: An internally balanced rotating assembly paired with a hydraulic roller camshaft guarantees smooth power delivery at high RPMs.

Component Breakdown: Mid-Dress Performance Long Block

This partially assembled engine accelerates your powertrain swap project by including major induction hardware pre-installed.

- A matched carbureted intake manifold pairs with the included distributor and harmonic balancer to simplify front drive integration immediately out of the crate.
- Heavy duty aluminum cylinder heads resist thermal fatigue while the pre-installed oil pan and flexplate streamline the bottom end installation securely.

Vehicle Fitment & Compatibility Matrix

Engineered as a comprehensive powertrain solution this mid-dress Windsor engine drops effortlessly into iconic Ford muscle cars. Sourcing one of our heavy-duty Ford stroker crate engines bypasses complex machine shop delays.

- Fits 1969-1973 Ford Mustang models replacing tired small blocks perfectly.
- Fits 1980-1996 Ford Bronco platforms seeking massive low end torque upgrades.
- Fits 1969-1973 Mercury Cougar chassis acting as a direct fit performance replacement.
- Fits classic Ford F-100 pickup trucks looking for aggressive towing and street power.

Fuel & Ignition System Requirements

Proper fuel delivery dictates the final performance output of this carbureted platform.

- A high flow 750 CFM carburetor is required to supply the intake manifold while utilizing 91 Octane premium pump gas prevents pre-ignition under load.
- The included distributor mandates a direct twelve volt ignition source bypassing factory resistor wires to guarantee a powerful spark.

Installation, Break-In Oil & Priming Instructions

Professional mechanical preparation separates a successful engine build from a catastrophic premature failure.

- Fill the crankcase with a high zinc break in oil before manually priming the oil system with a dedicated priming tool 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

Investing in this ATK High Performance crate engine secures peace of mind through comprehensive manufacturer backing.

- Backed by a strict 1-Year manufacturer warranty this engine provides excellent protection against internal manufacturing defects when installed properly.
- Designated strictly for Race Use Only on non-pollution controlled motor vehicles this package ships securely via LTL freight.