PACH404: Chevrolet Small-Block SBC (1955-1985) to Ford Ecoboost 6R80/10R80 V6 Automatic Transmission Adapter Kit

Chevrolet Small-Block SBC (1955-1985) to Ford Ecoboost 6R80/10R80 V6 Automatic Transmission Adapter Kit

ADDITIONAL PRODUCTS AVAILABLE:  If you are planning to purchase a Shift Controller option with your Adapter Kit, please see the link below to add the Throttle-position Sensor (TPS) Adapter Kit to suit your application.

TRANSMISSION STAND-ALONE CONTROLLERS & TPS ADAPTER KITS - ADD-TO-ORDER HERE

This kit is ONLY compatible with 2-piece rear main seal internally balanced engines from 1955-85; such as the common classic 350ci

KIT OVERVIEW

Looking for an Affordable 6R80 or 10R80 V8 Transmission Alternative? Try the Ecoboost V6 Instead!

Building on a budget or just can't justify the high price of a V8 6R80? We've got a smarter, cost-effective solution—use a Ford Ecoboost V6 transmission instead!

V6 6R80 and 10R80 transmissions are not only more affordable and widely available, but they also benefit from excellent aftermarket support. While the V6 and V8 versions share many components, there are two key differences to be aware of:

1. Bellhousing Shape – The V6 and V8 have different bellhousing profiles.
2. Rear Output Bearing – The V6 uses a heavy-duty ball bearing, while the V8 features a roller bearing. Why does this matter? The ball bearing in the V6 provides improved support due to the higher low-end torque of Ecoboost V6 engines—making it an ideal fit for performance or towing applications.

Functionally, these transmissions are nearly identical otherwise, making the V6 version a great option for many builds.

Important Fitment Note: The 6R80 and 10R80 use different torque converter spacing. Be sure to order the correct adapter kit for your transmission.

This kit requires use of a 164-tooth neutral balanced small block Ford flexplate (Pioneer #FRA-317 or SFI PRW 1830200).  

Constructed from high-quality materials, the adapter plate is crafted from 6061 Billet aluminum and measures 1" thick. It is contoured to fit the engine and transmission interfaces as closely as possible, ensuring a seamless connection. The crank spacer/adapter is made from 1018 Steel, providing both strength and precision without compromising on durability.

Efforts have been made to minimize the addition of rotating mass and keep the adapter's length as minimal as possible to prevent interference. The starter is mounted directly onto the adapter plate and is designed to snugly fit into the Small Block Ford (SBF) & Modular starter boss. However, depending on the specific transmission used, minor material removal may be necessary to ensure proper clearance.

In summary, this kit offers a reliable and precise solution for mating a small block Chevy engine to a Modular or Ford Small Block automatic transmission, allowing for a smooth engine swap while maintaining the integrity of your original driveline setup.

Kit Components:
1ea - Adapter Plate
1ea - Crank Adapter
1ea - High Torque Mini Starter
1ea - Hardware Kit

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608-640-2328 or Sales@Performanceadapters.com

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