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  See more parts for Mercury Cougar
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Eagle Pro Street Rotating Assembly SJC Heads Ford 460 Big Block F-Series 1973-1997 - 65124030

If you’re diving into the world of naturally-aspirated racing, the Eagle Pro Street Rotating Assembly is something you should definitely check out. I've had my hands on this setup, and let me tell you, it’s built for performance. This assembly is specifically designed for those who want to squeeze every bit of power out of their engine.

Let’s talk numbers for a second. With a displacement of 520, this assembly packs a punch. The heart of it all is the 4.300" forged 4340 crank, which is as tough as they come. Pair that with 6.800" 4340 I-beam rods, and you’ve got a solid foundation to handle some serious RPMs. The Mahle forged 4032 flat-top pistons, with a dome volume of -3CC, are a perfect match for SJC heads, giving you the compression you need without breaking a sweat.

One thing I really appreciate is the attention to detail in the components. The plasma-moly file-fit rings ensure a snug seal, which is crucial for performance. And let’s not forget the King XP rod and main bearings—they're designed to reduce friction, so you can focus on pushing your limits rather than worrying about wear and tear.

Now, if you’re wondering where this assembly fits, it’s compatible with a range of Ford models. We’re talking about the F-Series from 1973 to 1997, E-Series from 1975 to 1996, the Thunderbird from 1972 to 1976, and even the Mercury Cougar from 1974 to 1976. So, whether you're restoring a classic or building a beast, this assembly has got you covered.

Just a heads up: make sure you get this assembly balanced by a qualified machine shop before you fire it up. It’s a crucial step that can’t be overlooked if you want to hit the track without issues.

In short, the Eagle Pro Street Rotating Assembly is a solid choice for anyone serious about getting the most out of their engine. It’s not just about the specs; it’s about the experience and the thrill of racing that this assembly can help you achieve.

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

Vehicle
1974-1976
 Mercury Cougar

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Who is EAGLE?

EAGLE SPECIALTY PRODUCTS, aka EAGLE, has been at the forefront of developing top-quality engine components. The company officially started back in 1992 but has been developing their product for ten years prior.  Since the company started, it has continuously produced some of the market's best engine components and is widely used by engine builders worldwide.

Imitated But Not Duplicated

Due to the company's success, its products have been imitated by other companies even up to the part numbers. But the similarity ends only up to how they look. EAGLE uses the finest materials and has invested in the most state-of-the-art manufacturing machinery for them to create a product that would be able to take any punishment it is subjected to. It is tested to be superior to other brands and considered the best upgrade for OEM counterparts.

No To Shortcuts

The company sets the benchmark on how valves should be properly made. Using their years of experience creating rods, they have already designed over 200 different rods and 180 crankshafts. The company does not allow cost to compromise its material used, manufacturing process, and quality test. 

High-End Quality

All of Eagle's products are made up of high-quality materials. They use certified 4340 Chromoly steel. Using their own special heat treatment process, they are able to create a product that is much stronger compared to other competitors using the same raw material. 

They manufacture their rods using a 2-piece forging process that allows the rod to be stronger. This process orients the "grain" of the metal to the direction of the stress. Eagle uses a state-of-the-art Sunnen Krossgrinding system that allows them to create perfect cuts and bore consistently. 

Purchase EAGLE rods at Vivid Racing

If you want to upgrade your engine rods to something stronger and more reliable, then EAGLE is the brand for you. With their proven design and formula for creating rods, they have been sought after by top racing teams and engine builders. If they trust Eagle, so can you. Visit Vivid Racing and check out the list of parts specifically for your needs.

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