1. Cylinder Heads & Parts Engines Components For Sale
  2. sku: 11434676494310731
  3. JEEP WAGONEER

JEEP 306-00621C Cylinder Head Air 8-327 65-67

fits model: Wagoneer. make: Jeep. year: 1965.

306-00621c Jeep Cylinder Head 8-327 Without Air Fits 65-67 Wagoneer 1318428

( Part Type: Cylinder Head ), ( Conditions Options: 327 ), ( Genuine Oem: Yes ), ( Ipn: 306-00621c )

Review JEEP Cylinder Head Without Air fits WAGONEER 1965

The **Jeep 306-00621C Cylinder Head (8-327 Air, 1965-1967 Wagoneer)** is a meticulously crafted, high-performance component designed specifically for the iconic **327 cubic-inch V8 engine** found in the legendary **1965-1967 Jeep Wagoneer**, particularly those equipped with the **Air-Conditioned (Air) model**. This cylinder head is a critical element in the engine s combustion process, ensuring optimal airflow, cooling efficiency, and power output while maintaining the rugged reliability that Jeep vehicles are renowned for. Engineered from **high-grade cast iron**, this head is built to withstand the demanding stresses of high-performance driving, whether navigating off-road trails or cruising on paved highways. The **306-00621C** features **eight individually machined combustion chambers**, each precisely designed to maximize compression ratios and combustion efficiency, which translates to improved throttle response and torque delivery. The head includes **four intake and four exhaust ports per bank**, allowing for superior cylinder filling and exhaust scavenging, essential for maintaining peak engine performance in both stock and modified applications. The **valve guide and seat surfaces** are carefully honed to ensure a tight seal, reducing the risk of blow-by and maintaining optimal compression. This cylinder head is fully compatible with the **327 Air-Conditioned Wagoneer s** original valve train, including the **solid or hydraulic lifters**, pushrods, and rocker arms, making it an ideal replacement for worn or damaged stock heads. Whether restoring a classic Wagoneer to its original glory or upgrading an existing engine for enhanced performance, this **306-00621C** cylinder head delivers the durability, precision, and power that Jeep enthusiasts demand. Built to exacting specifications, it ensures a seamless fit with the **327 engine s block, intake manifold, and exhaust headers**, making it a must-have part for anyone seeking to preserve or elevate the performance of their vintage Jeep.

### **Pros and Cons of Buying a Jeep 306-00621C Cylinder Head (8-327 Air, 65-67 Wagoneer)**

#### **Pros:**

1. **Compatibility and Fitment** This cylinder head is designed specifically for the 327 cubic inch inline-six engine found in 1965-1967 Jeep Wagoneers (and some other Jeep models from that era). It is a direct replacement part, meaning it will fit without major modifications if sourced correctly.

2. **Performance Potential** The 327 inline-six engine is a solid, durable powerplant when properly maintained. With a well-built cylinder head, you can achieve reliable performance, especially if you plan to run it with stock or mild modifications.

3. **Availability of Parts** While not as common as modern parts, cylinder heads for this engine are still available through specialty Jeep and aftermarket suppliers. Jeep s original parts (or high-quality reproductions) can be found if you search the right places.

4. **Classic Jeep Appeal** If you re restoring or maintaining a vintage Jeep, using an original or reproduction cylinder head helps preserve authenticity. It also ensures that the engine remains true to its original design.

5. **Potential for Restoration** If the head is in good condition (or can be restored), it may be more cost-effective than buying a complete engine. Rebuilding or machining a cylinder head can extend its life significantly.

6. **Aftermarket Support** There are aftermarket cylinder heads and performance upgrades available for the 327, such as those from **Jeep Performance Parts, Edelbrock, or Holley**, which can improve airflow and power if you re looking to modify the engine.

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#### **Cons:**

1. **Age and Wear** Cylinder heads from this era (1965-1967) may show signs of wear, such as cracked cast iron, warped decks, or worn valve seats. If the head is not in good condition, it may require extensive machining or replacement of internal components.

2. **Difficulty in Sourcing** Finding a **genuine OEM cylinder head** in good condition can be challenging. Many aftermarket parts may be reproductions, which may not match the original quality. You may need to search eBay, junkyards, or specialty Jeep forums to locate one.

3. **Machining and Rebuilding Costs** Even if you find a head, it may need **decking, valve seat replacement, or port matching** to ensure proper sealing and performance. These services can be expensive, especially if done professionally.

4. **Limited Modern Support** Unlike newer engines, finding **seals, gaskets, or specialized tools** for a 327 cylinder head can be difficult. You may need to source parts from vintage automotive suppliers.

5. **Potential for Hidden Damage** Cylinder heads from this era were not always built to modern standards. Issues like **cracked combustion chambers, worn valve guides, or corroded valve springs** can go unnoticed until the engine is disassembled.

6. **Time-Consuming Restoration** If the head is in poor condition, restoring it may require **sanding, welding, or complete replacement of internal components**, which can be a labor-intensive process.

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### **Conclusion:**

Buying a **Jeep 306-00621C cylinder head (8-327 Air, 65-67 Wagoneer)** can be a **good investment** if you are restoring a classic Jeep and need a **direct replacement part**. However, the **condition of the head, availability, and potential restoration costs** must be carefully considered.

If you find a **high-quality, well-maintained head** (or a reproduction that matches OEM specs), it can be a **cost-effective way to keep your engine running**. However, if the head is **cracked, warped, or in poor condition**, the **cost of machining and rebuilding may outweigh the benefits**.

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### **Recommendation:**

1. **Inspect Thoroughly Before Purchase** If buying used, **visually inspect for cracks, warping, or corrosion**. A **pressure test** can help identify hidden damage.

2. **Consider a Reproduction Head** If original parts are scarce, a **high-quality reproduction** (from a trusted supplier like **Jeep Performance Parts or Summit Racing**) may be a safer bet.

3. **Budget for Machining** If the head needs work, **factor in the cost of decking, valve seat replacement, and port matching** before purchasing.

4. **Check for Complete Engine Options** If the head is beyond repair, **weigh the cost against buying a complete rebuilt 327 engine**, which may be more reliable in the long run.

5. **Consult a Vintage Engine Specialist** If you re unsure, **take the head to a Jeep specialist or engine machine shop** for an assessment before committing to a purchase.

**Final Verdict:**

- **If you have a reliable source for a good-used or reproduction head and are prepared for potential machining costs, it can be a worthwhile purchase.**

- **If the head is in poor condition or hard to find, consider alternative solutions (like a complete engine rebuild) to ensure long-term reliability.**

Would you like help finding reputable suppliers or inspection tips?

Details:

WAGONEER 66-67 8-327, w/o AIR. Bolt-on items No expedited shipping is available. Labor and Related Costs: This limited warranty does not cover labor, diagnostics, towing, rental car costs, or any other expenses related to the installation, testing, removal, replacement of a part.

Exclusions from Limited Warranty. The part has not been altered, modified, disassembled, overheated or damaged. All parts sold as is except expressly provided below. The part is not a special order.

Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Dispute Resolution.

Please remember you are purchasing OEM Original Equipment Manufacturer USED parts. Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way. Brokered/non-stocked parts ordered specifically for your request. Transmissions: Transmissions will come with the torque converter and all sensors.

The part is not a custom body cut. Limited Warranty Coverage. Steering Columns: All steering columns sold will come without airbags. Convenience Items: Items attached to or included with the part, such as wiring, bulbs, sockets, sensors, coils, distributor caps, spark plugs, water pumps, filters, brake parts, backing plates, hoses, vacuum lines, u-joints, timing belts/components, similar items, are considered convenience items and not covered by this limited warranty.

WAGONEER 65 8-327. AMBASSADOR 65 8-287. Bumper assemblies DO NOT come with Upper Grilles unless stated. Sensors, valve covers, timing covers attached to core short/long blocks are not covered.

Check the Q A section for Business Support. Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period. The part has not been installed. Normal wear and tear from the previous use is expected.

part #: 306-00621c prices

  • $75.00-$225.00

specifications cylinderheapar:

  • for models: Wagoneer
  • for makes: Jeep
  • for years: 1965
  • part type: Cylinder Head
  • conditions options: 327
  • genuine oem: Yes
  • ipn: 306-00621c

general cylinderheapar:

  • condition: Used
  • Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads

offer cylinderheapar:

  • availability: In Stock
  • quantity: 1
  • sold: 0
  • started: February 4, 2026
  • options: Ship-to-home

payments cylinderheapar:

  • credit card: Mastercard
  • other
  • wallet: Paypal

seller cylinderheapar:

  • rating: 99.6%
  • city: Annandale, Minnesota
  • # reviews: 42832

returns cylinderheapar:

  • paid by: Buyer
  • policy: Returns Accepted
  • time: 30 Days

shipping cylinderheapar:

  • cost: $65.00
  • class: Standard
  • type: Fixed
  • service: Standard
  • transit: 2-5 Days
for models: wagoneer, for makes: jeep, for years: 1965, part type: cylinder head, conditions options: 327, genuine oem: yes,
manufacturer: jeep, category: auto parts > car truck parts accessories > engines engine parts > cylinder heads, sku: 11434676494310731,
Jeep 8-327 Is Similar To:
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3 offers $75.00–$225.00 USD
  • Used. Offer #1 priced at $75.00 + $65.00 shipping estimate = $140.00* total. MARLIN 65 8-287. WAGONEER 65 .+$65.00 shipping
  • Used. Offer #2 priced at $75.00 + $65.00 shipping estimate = $140.00* total. +$65.00 shipping
  • Used. Offer #3 priced at $225.00 + $0.00 shipping estimate = $225.00* total. WAGONEER 66-72 (head only) WAGONEER 65 (head only), 6-232, from chassis ID 200002.FREE SHIPPING

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