ATK Marine DMA1-GTP Ford 351W 5.8L Rebuilt Long Block

Description

Upgraded factory power requirements demand the ATK Marine DMA1-GTP Ford 351W 5.8L Rebuilt Long Block and its high-flowing GTP cylinder heads. Achieve aggressive acceleration out of the hole during water sports towing. This build utilizes a precision machined 5.8L iron block to output enhanced marine torque effortlessly.

Key Features of ATK Marine DMA1-GTP

• High-Flow GTP Cast Iron Cylinder Heads: Maximizes intake air velocity to generate superior mid-range horsepower and torque for demanding marine duties.
• Seasoned 351 CID Cast Iron Block (1-Piece Seal): Provides exceptional structural rigidity to support continuous high-load operation in marine environments.
• Corrosion-Resistant Brass Freeze Plugs: Eliminates rust-through risks in raw-water cooled applications to protect structural block integrity.
• Marine-Calibrated Flat Tappet Camshaft: Optimizes valve timing events to produce a flat torque curve and reliable low-speed docking idle.
• Externally Balanced Rotating Assembly: Minimizes harmonic vibrations to protect the crankshaft main bearings from premature wear during extended cruising.

Component Breakdown: Marine Rebuilt Long Block

This assembled marine base long block provides a high-performance Ford foundation for boat repowers and overhauls.

• A precision machined cast iron block houses a marine calibrated camshaft designed to deliver consistent low-end torque.
• Upgraded cast iron cylinder heads improve overall thermal retention while thick internal bearings maintain steady oil pressure under constant load.

Vehicle Fitment & Compatibility Matrix

Engineered to replace classic marine engines this 5.8L block aligns perfectly with standard marine motor mounts. Sourcing one of our high-output Ford marine engines restores the propulsion of your vessel instantly.

• Fits classic inboard marine propulsion systems utilizing standard-rotation Ford small block architecture.
• Fits classic stern-drive marine propulsion systems requiring a high-output 351 CID engine replacement.
• Fits heavy cruisers and wake boats looking for an authentic 5.8L marine power upgrade.

Fuel & Ignition System Requirements

Feeding this classic marine engine demands proper fuel tuning and reliable USCG-approved ignition components.

• A USCG-approved mechanical marine fuel pump is required to supply your carburetor while utilizing marine-grade fuel prevents pre-ignition.
• Heavy duty spark plug wires must be utilized alongside an approved marine distributor to maintain a powerful spark and prevent bilge explosions.

Installation, Break-In Oil & Priming Instructions

Proper initial startup procedures are absolutely critical to ensure the survival of the hydraulic flat tappet camshaft and lifters.

• Transfer your existing marine intake manifold using fresh gaskets before manually priming the oil system with a dedicated priming tool until pressure is verified.
• Fill the crankcase with a high zinc break in oil and hold the engine steady at 2000 RPM for 20 minutes to properly seat the flat tappet lifters.

USA Warranty, Emissions & Logistics

Investing in this ATK Marine rebuilt 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 in a marine application.
• This assembly requires a valid core exchange of your original marine block and ships securely via LTL freight to commercial addresses.