Pair Remanufactured Chevy GM Marine Mercruiser OHV 5.7 V8 350 Cylinder Heads Casting # 624 Only

Welcome to Heavy Duty Parts Company, your trusted source for high-performance cylinder heads.

Key Features:

• Complete Assembly: Each cylinder head comes fully equipped, ready for installation.
• Core Return Required

Why Choose Our Cylinder Heads?

At Heavy Duty Parts Company, we are committed to excellence in craftsmanship and performance. Here’s why our Chevy GM Marine OHV 5.7 V8 350 Cylinder Heads are your best choice:

• Quality Assurance: All cylinder heads undergo rigorous inspection and testing to ensure optimal performance and reliability in marine conditions.
• Precision Machining: Utilizing advanced machining techniques, each head is engineered to exact specifications for perfect fit and function.
• Durable Construction: Built from high-quality materials to withstand the rigors of marine environments, ensuring longevity and performance consistency.

Applications and Compatibility

Our Chevy GM Marine OHV 5.7 V8 350 Cylinder Heads are compatible with a range of marine applications, providing robust performance for:

• Pleasure boats
• Fishing vessels
• Marine transport vehicles

For a detailed list of compatible models and applications, please visit our product shop.

BLAZER/JIMMY (full size) 71-74 8-350

BLAZER/JIMMY (full size) 73 8-307

BLAZER/JIMMY (full size) 75 8-350, 2BC

BLAZER/JIMMY (full size) 75 8-350, 4BC, 4×2

BLAZER/JIMMY (full size) 78 8-350, w/California

BLAZER/JIMMY (full size) 79-86 8-350 (5.7L)

CAMARO 71 8-350, 245 HP

CAMARO 71 8-350, 270 HP

CAMARO 72 8-350, 165 HP

CAMARO 72 8-350, 200 HP

CAMARO 73 8-307

CAMARO 73 8-350, 175 HP

CAMARO 73-74 8-350, 145 HP

CAMARO 74 8-350, 160 HP

CAMARO 74 8-350, 185 HP

CAMARO 75-81 8-350 (5.7L)

CAPRICE 80-85 8-350 (5.7L), gasoline

CAPRICE 86 8-350 (5.7L)

CENTURY 77 8-350, 4BC, VIN L (5th digit, Chev)

CENTURY 78-79 8-350 (5.7L)

CHEVELLE 71-77 8-350

CHEVELLE 73 8-307

CHEVROLET 10 PICKUP 71-74 8-350 (5.7L);

CHEVROLET 10 PICKUP 73 8-307;

CHEVROLET 10 PICKUP 75-77 8-350 (5.7L); 4×2, w/o heavy duty chassis

CHEVROLET 10 PICKUP 78 8-350 (5.7L); gasoline, 4×2, w/o heavy duty chassis

CHEVROLET 10 PICKUP 79-80 8-350 (5.7L); gasoline, 4×2

CHEVROLET 10 PICKUP 81 8-350 (5.7L); gasoline

CHEVROLET 10 PICKUP 82-86 8-350 (5.7L);

CHEVROLET 10 VAN 71 8-350 (5.7L); late

CHEVROLET 10 VAN 72-80 8-350 (5.7L);

CHEVROLET 10 VAN 73 8-307;

CHEVROLET 10 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

CHEVROLET 20 PICKUP 71 8-350 (5.7L);

CHEVROLET 20 PICKUP 73 8-307;

CHEVROLET 20 PICKUP 82 8-350 (5.7L); VIN L (8th digit)

CHEVROLET 20 VAN 71 8-350 (5.7L); late

CHEVROLET 20 VAN 72-73 8-350 (5.7L);

CHEVROLET 20 VAN 73 8-307;

CHEVROLET 20 VAN 74 8-350 (5.7L); Sport Van

CHEVROLET 20 VAN 78 8-350 (5.7L); w/California, Sport Van

CHEVROLET 20 VAN 79-80 8-350 (5.7L); Sport Van

CHEVROLET 20 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

CHEVROLET 30 PICKUP 71 8-350 (5.7L);

CHEVROLET 30 PICKUP 82 8-350 (5.7L); VIN L (8th digit)

CHEVROLET 30 VAN 71 8-350 (5.7L); late

CHEVROLET 30 VAN 72-74 8-350 (5.7L); Sport Van

CHEVROLET 30 VAN 73 8-307;

CHEVROLET 30 VAN 78 8-350 (5.7L); exc. Cutaway; Sport Van, w/California

CHEVROLET 30 VAN 79 8-350 (5.7L); w/o heavy duty chassis; Sport Van

CHEVROLET 30 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

CHEVROLET FORWARD CONTROL 71 8-350 (5.7L);

CHEVROLET FORWARD CONTROL 73 8-307;

CHEVROLET PASS. 71-79 8-350

CORVETTE 71 8-350, 270 HP

CORVETTE 72 8-350, 200 HP

CORVETTE 73 8-350, 190 HP

CORVETTE 74 8-350, 195 HP

CORVETTE 75 (8-350), 165 HP

CORVETTE 76-77 (8-350)

CORVETTE 78 185 HP

CORVETTE 79 195 HP

CORVETTE 80 8-350 (5.7L), 190 HP

CORVETTE 81-82

CORVETTE 84-85

CORVETTE 86 cast iron

CUTLASS 78 8-350

CUTLASS 79 8-350, gasoline, VIN L (5th digit, Chev)

FIREBIRD 78-79 8-350

GMC 1500 PICKUP 71-74 8-350 (5.7L);

GMC 1500 PICKUP 73 8-307;

GMC 1500 PICKUP 75-77 8-350 (5.7L); 4×2, w/o heavy duty chassis

GMC 1500 PICKUP 78 8-350 (5.7L); gasoline, 4×2, w/o heavy duty chassis

GMC 1500 PICKUP 79-80 8-350 (5.7L); gasoline, 4×2

GMC 1500 PICKUP 81 8-350 (5.7L); gasoline

GMC 1500 PICKUP 82-86 8-350 (5.7L);

GMC 1500 VAN 71 8-350 (5.7L); late

GMC 1500 VAN 72-80 8-350 (5.7L);

GMC 1500 VAN 73 8-307;

GMC 1500 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

GMC 2500 PICKUP 71 8-350 (5.7L);

GMC 2500 PICKUP 73 8-307;

GMC 2500 PICKUP 82 8-350 (5.7L); VIN L (8th digit)

GMC 2500 VAN 71 8-350 (5.7L); late

GMC 2500 VAN 72-73 8-350 (5.7L);

GMC 2500 VAN 73 8-307;

GMC 2500 VAN 74 8-350 (5.7L); Sport Van

GMC 2500 VAN 78 8-350 (5.7L); w/California, Sport Van

GMC 2500 VAN 79-80 8-350 (5.7L); Sport Van

GMC 2500 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

GMC 3500 PICKUP 71 8-350 (5.7L);

GMC 3500 PICKUP 82 8-350 (5.7L); VIN L (8th digit)

GMC 3500 VAN 71 8-350 (5.7L); late

GMC 3500 VAN 72-74 8-350 (5.7L); Sport Van

GMC 3500 VAN 73 8-307;

GMC 3500 VAN 78 8-350 (5.7L); exc. Cutaway; Sport Van, w/California

GMC 3500 VAN 79 8-350 (5.7L); w/o heavy duty chassis; Sport Van

GMC 3500 VAN 81-86 8-350 (5.7L); VIN L (8th digit)

GMC FORWARD CONTROL 71 8-350 (5.7L);

GMC FORWARD CONTROL 73 8-307;

IMPALA 80-85 8-350 (5.7L), gasoline

LE MANS 78 8-350, VIN L (5th digit, Chev)

MALIBU 78-79 8-350

MONTE CARLO 71-77 8-350

NOVA 71-79 8-350

NOVA 73 8-307

OLDSMOBILE 77 8-350, 4BC, VIN L (5th digit, Chev)

OMEGA 77 8-350, VIN L (5th digit, Chev)

OMEGA 78-79 8-350

PHOENIX 77 8-350, VIN L (5th digit, Chev)

PHOENIX 78-79 8-350

REGAL 77 8-350, 4BC, VIN L (5th digit, Chev)

SKYLARK 77 8-350, VIN L (5th digit, Chev)

SKYLARK 78-79 8-350 (5.7L)

SPRINT (GMC) 71-79 8-350

SPRINT (GMC) 73 8-307

SUBURBAN 10 71-74 8-350 (5.7L);

SUBURBAN 10 73 8-307;

SUBURBAN 10 78 8-350 (5.7L); w/California

SUBURBAN 10 79-86 8-350 (5.7L);

SUBURBAN 1500 71-74 8-350 (5.7L);

SUBURBAN 1500 73 8-307;

SUBURBAN 1500 78 8-350 (5.7L); w/California

SUBURBAN 1500 79-86 8-350 (5.7L);

SUBURBAN 20 71-74 8-350 (5.7L);

SUBURBAN 20 73 8-307;

SUBURBAN 20 78 8-350 (5.7L); w/California

SUBURBAN 20 79 8-350 (5.7L); w/o heavy duty chassis

SUBURBAN 20 80 8-350 (5.7L); VIN L (3rd digit)

SUBURBAN 20 82 8-350 (5.7L); VIN L (8th digit)

SUBURBAN 2500 71-74 8-350 (5.7L);

SUBURBAN 2500 73 8-307;

SUBURBAN 2500 78 8-350 (5.7L); w/California

SUBURBAN 2500 79 8-350 (5.7L); w/o heavy duty chassis

SUBURBAN 2500 80 8-350 (5.7L); VIN L (3rd digit)

SUBURBAN 2500 82 8-350 (5.7L); VIN L (8th digit)

VENTURA II 77 8-350, VIN L (5th digit, Chev)

Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

Additional Information and Services

• Shipping: We offer shipping with comprehensive packaging and handling included in the shipping price.
• Warranty: Rest assured with our warranty coverage for peace of mind. Contact us for detailed warranty terms.

Learn More About Chevy 350 Motors

Explore the capabilities of the Chevy 350 motor and its compatibility with our cylinder heads by visiting the official Chevy 350 Motor website.

Contact Us

Heavy Duty Parts Company is your dedicated partner for high-performance cylinder heads. We specialize in delivering quality solutions for marine and automotive applications alike.

Conclusion

Elevate your marine engine’s performance with our Chevy GM Marine OHV 5.7 V8 350 Cylinder Heads. Backed by our commitment to quality and performance, these cylinder heads are the ideal choice for your marine engine upgrade or replacement needs.

Visit our product page or contact us today to learn more about how Heavy Duty Parts Company can enhance your marine engine’s reliability and performance.

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