632 Aluminum Marine Long Block

Starting at $19,499

Our aluminum 632 Big Block Chevy Marine Engine delivers the same extreme power of the iron version in a lighter package. Experience all the benefits of an airboat specific, big block torque curve with the weight of a small block. Perfect for industrial boats that need to carry heavy equipment!

Fuel Type

Fuel Type

Pump Gas


Idle Quality

Idle Quality

Best Use

Best Use

Horsepower: 750
Torque: 825
Bore/Stroke: 4.600 x 4.750
Compression: 10:1
Fuel Type: Pump Gas, 93 AKI (USA) / 98 RON
Block: Aftermarket 10.2, Aluminum
Crankshaft: 4340 Forged
Rods: H-Beam, 4340 Forged Steel
Pistons: 2618 Forged Aluminum 3cc Valve Relief
Bearings: Clevite H-Series Coated
Camshaft: Hydraulic Roller
Heads: Aluminum, CNC Rect Port
Valves: Ferrea Super Alloy Exhaust, 6000 Series Intake
Rocker Arms: SBillet Aluminum, Full Roller, Girdled
Intake: Not Included
Oil Pan: Marine
Valve Covers: Polished Aluminum, Dual Breathers
Power Adder: N/A
Fuel Delivery: Not Included
Ignition: Not Included
Dyno Testing Image

Dyno Testing

Here at Prestige Motorsports, our “Dyno Promise” means that we dyno test every engine we build to verify the quality of our work, the integrity of each component, and the reliability of every engine we construct. Then, we deliver the dyno results for your project directly to you, the customer.

Warranty Image


This Prestige Motorsports engine is built to order and comes with a 3-year, unlimited miles warranty. Our warranty covers the base engine from intake manifold to oil pan.

Comparable Engines

Product: Current: 632 Aluminum Marine Long Block 632 Marine Engine 582 Marine Engine
Horsepower: 750 750 650
Torque: 825 825 725
Best Use: Airboat Airboat Airboat
Max RPM: 6,000 6,000 6,000
Idle Quality: Lopey Lopey Lopey
Bore/Stroke: 4.600 x 4.750 4.600 x 4.750 4.600 x 4.375
Block: Aftermarket 10.2, Aluminum Aftermarket 10.2 Deck, Iron Aftermarket 9.8 Deck, Iron
Crankshaft: 4340 Forged 4340 Forged Steel 4340 Forged Steel
Rods: H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel H-Beam, 4340 Forged Steel
Pistons: 2618 Forged Aluminum 3cc Valve Relief 2618 Forged Aluminum 3cc valve relief 2618 Forged Aluminum 10cc dome
Oil Pan: Marine Marine Marine
Camshaft: Hydraulic Roller Hydraulic Roller Hydraulic Roller
Heads: Aluminum, CNC Rect Port Aluminum, CNC Rect Port Aluminum, As-Cast Rect Port
Intake: Not Included Not Included Not Included
Price: Starting at $19,499 Starting at $16,999 Starting at $13,999

Upgrades & Add-ons

Ready to upgrade your project? Add a kit from each area below to convert your base engine into a turn-key package. Kits come installed and dyno tested with your engine. Please note that not all of the options listed below are available for every engine. Contact us for more details.

Fuel Supply

Don’t waste time and frustration on that old carburetor. Fuel your engine with a dyno tested system for proven performance.

Ignition System

You'll need a top-notch ignition system for trouble-free performance. Let us customize one for you with everything needed to keep the spark alive.

Pulley Kits & Accessories

Pulleys drive vital components. Let us install a high-quality kit that keeps your engine running and provides max clearance for cooling systems. Available in multiple finishes!