The massive rotating assembly inside the ATK Ford 408 Stroker 480 HP HP81 Stage 1 cures sluggish low-end throttle response. Experience brutal off-the-line acceleration during competitive weekend drag racing events. This build utilizes a precision machined Windsor iron block to output four hundred eighty horsepower smoothly.

Key Features of ATK Ford 408 Stroker 480 HP HP81

- Block Material: Cast iron Ford Windsor Small Block establishes a highly rigid foundation to prevent structural flexing under extreme torque loads.
- Cylinder Heads: High-performance aluminum cylinder heads increase volumetric efficiency to feed the massive 6.7-liter displacement effortlessly.
- Rotating Assembly: An internally balanced rotating assembly paired with a hydraulic roller camshaft reduces valvetrain friction for reliable high-RPM operation.
- Bore & Stroke: The 4.030-inch bore and 4.000-inch stroke maximize internal volume to generate massive low-end torque for heavy chassis applications.
- Rear Main Seal: A modern one-piece rear main seal prevents oil leaks and ensures a clean garage floor after heavy street driving.

Component Breakdown: Base Long Block Configuration

This assembled base long block provides a robust foundation for heavy street and strip engine builds.

- A precision machined cast iron block houses a performance calibrated hydraulic roller camshaft designed to deliver massive off-the-line torque.
- Lightweight aluminum cylinder heads improve overall thermal efficiency while heavy duty internal bearings maintain steady oil pressure under heavy acceleration.

Vehicle Fitment & Compatibility Matrix

Engineered to drop seamlessly into classic Ford engine bays this 6.7L stroker aligns perfectly with standard motor mounts. Sourcing one of our high-output Ford Windsor crate engines bypasses complex internal engine assembly entirely.

- Fits 1965-1973 Ford Mustang models acting as a direct fit performance replacement.
- Fits 1966-1977 Ford Bronco chassis replacing tired factory blocks perfectly.
- Fits 1967-1973 Mercury Cougar platforms looking for aggressive street and strip power.
- Fits classic Ford F-100 pickup trucks updating the original powertrain with a fresh block.

Fuel & Ignition System Requirements

Feeding this massive stroker engine demands proper fuel tuning and reliable high-voltage ignition components.

- An upgraded high pressure mechanical or electronic fuel pump is required to supply your carburetor while utilizing 91 Octane premium pump gas prevents pre-ignition.
- Heavy duty spark plug wires must be utilized alongside an aftermarket distributor to maintain a powerful spark across the RPM band.

Installation, Break-In Oil & Priming Instructions

Proper initial startup procedures ensure the longevity of the hydraulic roller lifters and internal bearings.

- Transfer your existing intake manifold using fresh gaskets before manually priming the oil system with a dedicated Windsor priming tool until pressure is verified.
- Fill the crankcase with a high zinc break in oil and perform a varied RPM heat cycle before 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.
- This assembly is not legal for sale or use on pollution controlled motor vehicles and ships securely via LTL freight to commercial addresses.