Engines and Components› Crankshafts and Components

ENGINEQUEST

Crankshaft Conversion Adapter

$183.49

SKU: EQ-RSH349

In Stock
In Stock
Ships by Sep 9
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ENGINEQUEST EQ-RSH349 is an engine conversion part designed to enable a rebuilder to install a 2-piece design crankshaft in a one-piece seal design block.

It is compatible with a wide range of Chevrolet and other GM vehicles from 1957 through 1985, as well as specific models from Avanti and Checker. The product requires an alignment tool for installation.
Show original supplier description
The ENGINEQUEST EQ-RSH349 is a specialized engine conversion adapter that facilitates the installation of a 2-piece design crankshaft into a block originally designed for a 1-piece seal. This adapter offers broad compatibility, fitting numerous Chevrolet models including Bel Air, Biscayne, Camaro, Caprice, Chevelle, Chevy II, Corvette, C10, C20, C30 pickups and Suburbans, and more, spanning model years from 1957 to 1985. It also fits select Buick, Avanti II, and Checker vehicles across various years. Installation of the EQ-RSH349 requires a specific alignment tool, which is essential for proper fitment and function. This ensures the precise positioning of the crankshaft and seal. While the primary application is for pre-1985 Small Block Chevy engines, some sources indicate compatibility with 1986-2002 Chevrolet V8 engines with 5.0L and 5.7L displacements, suggesting a broader application range depending on the specific engine block configuration.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandENGINEQUEST
Part NumberEQ-RSH349
CategoryEngines and Components

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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