AMERICAN MOTORS 300-07390C Engine Bored Crank 8-390 .030 8-401 1287487

( Brand: American Motors ), ( Part Type: Engine Crank Motor ), ( Conditions Options: 390, At, Recent Rebuild, Note ), ( Genuine Oem: Yes ), ( Ipn: 300-07390c ), ( Make: American )

Review AMERICAN MOTORS Rebuilt Engine Bored .030 Crank Fits fits AMX 1970

The American 300-07390C engine, also known as the 8-390, is a powerful and iconic V8 engine that was first produced by Chrysler in the late 1950s. This particular engine is a bored and stroked version of the original 390, with a bore size increased to 3.00 inches and a stroke length of 3.75 inches, resulting in a displacement of 383 cubic inches.

The 300-07390C engine is a part of the "Golden Commando" series, which was introduced in the late 1960s and was used in various Chrysler, Plymouth, and Dodge vehicles, including the 1970 AMX. This engine is known for its high performance and power output, making it a popular choice among enthusiasts and collectors.

The engine block is made of cast iron, which provides excellent durability and heat dissipation. It features a cross-flow design, which improves cooling efficiency and reduces heat buildup. The engine also has a forged steel crankshaft, which is a critical component that provides the rotational force necessary to power the engine. In this case, the crankshaft is an 8-401, which is a heavier-duty version designed to handle the increased power output of the bored and stroked engine.

The engine also features a high-performance camshaft, which is responsible for controlling the intake and exhaust valves. This camshaft provides improved valve lift and duration, resulting in increased power and torque. The engine also has a high-performance intake manifold and a four-barrel carburetor, which ensures efficient fuel delivery and optimal combustion.

The 300-07390C engine is a complex and sophisticated piece of machinery, and it requires regular maintenance and care to ensure optimal performance. It is important to use high-quality motor oil, filters, and spark plugs, and to perform regular tune-ups and engine checks. With proper care and maintenance, this engine can provide many years of reliable and high-performance service.

Overall, the American 300-07390C engine is a true classic and a must-have for any serious car enthusiast or collector. Its powerful and iconic design, combined with its high performance and durability, make it a popular choice among those who appreciate the art and science of automotive engineering. Whether you're restoring a classic car or building a hot rod, this engine is sure to be a centerpiece of your project.

Buying an aftermarket engine for a classic car like a 1970 AMX with an American 300-07390C engine (bored 0.30, 8-390) and an 8-401 crankshaft can be a significant investment. Here are some potential pros and cons to consider before making a decision:

1. Increased Performance: A bored and stroked engine can provide increased horsepower and torque, resulting in better performance and acceleration.

2. Improved Durability: A rebuilt engine can offer improved durability and reliability compared to a worn-out original engine.

3. Customization: An aftermarket engine can provide an opportunity to customize the engine to specific performance or aesthetic preferences.

4. Value Add: A high-performance engine can potentially add value to the classic car, making it more desirable to collectors and enthusiasts.

1. Cost: The cost of purchasing, installing, and tuning a new engine can be significant, especially for a classic car where labor costs may be higher due to the rarity of the vehicle.

2. Complexity: Installing a new engine can be a complex process that requires specialized knowledge and tools.

3. Potential Fitment Issues: There may be fitment issues that need to be addressed when installing a new engine, such as clearance issues with the transmission or engine bay.

4. Potential Power Balance Issues: A high-performance engine may require other upgrades to the transmission, exhaust, and cooling systems to handle the increased power.

In conclusion, buying an aftermarket engine for a classic car like a 1970 AMX can offer improved performance, durability, and customization opportunities. However, it also comes with significant costs, complexity, and potential fitment and power balance issues. Before making a decision, it is essential to carefully consider the benefits and drawbacks and consult with a professional mechanic or engine builder to ensure a successful installation.

If you are serious about upgrading your classic car's engine, it may be worth considering investing in a rebuilt engine from a reputable supplier or building the engine yourself with the help of experienced engine builders. Proper research, planning, and execution can lead to a successful engine upgrade that enhances the performance and enjoyment of your classic car.

Details:

Brokered/non-stocked parts ordered specifically for your request. Sensors, valve covers, timing covers attached to core short/long blocks are not covered. The part is not a special order.

Normal wear and tear from the previous use is expected. The part has not been installed. Any bulbs or wiring still attached to the,Tail Light,assemblies are not warranted part of the listing in any way.

Axles Assemblies: Axle assemblies will not include any brake hardware: Calipers/Rotors/Shoes/Pads/Hoses/Brake Lines. Steering Columns: All steering columns sold will come without airbags. No expedited shipping is available. Exclusions from Limited Warranty.

Scope: This limited warranty covers defects in the purchased part that render it inoperable or defective within 90-day period. Bolt-on items Check the Q A section for Business Support. Dispute Resolution.

Bumper assemblies DO NOT come with Upper Grilles unless stated. 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. 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. The part is not a custom body cut.

390,AT,RECENT REBUILD,401 CRANK,NOTE. Transmissions: Transmissions will come with the torque converter and all sensors. Limited Warranty Coverage. All parts sold as is except expressly provided below.

Please remember you are purchasing OEM Original Equipment Manufacturer USED parts. The part has not been altered, modified, disassembled, overheated or damaged.

part #: 300-07390c prices

• $6.00-$45.00

specifications grokengines:

• for models: Amx
• for years: 1970
• brand: American Motors
• part type: Engine Crank Motor
• conditions options: 390, At, Recent Rebuild, Note
• genuine oem: Yes
• ipn: 300-07390c
• make: American

returns grokengines:

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

payments grokengines:

• credit card: Visa
• wallet: Google-pay
• other

general grokengines:

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

shipping grokengines:

• type: Fixed
• cost: $335.00
• transit: 3-6 Days
• service: Standard
• class: Standard

offer grokengines:

• quantity: 1
• sold: 0
• started: October 24, 2025
• options: Ship-to-home
• availability: In Stock

seller grokengines:

• city: Annandale, Minnesota
• # reviews: 39078
• rating: 99.5%

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