Yoursme LS swap motor mount adapter plates — Billet aluminum adjustable fit for SBC, raises crank 0.17"

Yoursme LS swap motor mount adapter plates let you bolt an LS-series engine into a vehicle using the original small-block Chevy mounts with an adjustable, CNC-milled aluminum bracket.

These adapter plates are engineered to bridge the gap between SBC/BBC engine bays and modern LS engines (LS1, LS2, LS3, LQ4, LQ9, LS6, L92, L99, L33, LR4). CNC-milled from billet aluminum and finished to OEM-style tolerances, the plates lift the crank centerline by 0.17 inches and include a center relief to clear the hump on many small-block mounts — eliminating the need to grind old mounts for a flush fit.

How do these adapter plates change engine fitment?

The plates relocate the LS engine mounting points to align with your vehicle's existing small-block Chevy mounts. By raising the crank centerline by 0.17 inches and offering four adjustable positions, they help clear headers, oil pans, and steering components without major fabrication.

• Moves crankshaft centerline up 0.17" for correct driveline geometry
• Four indexed positions to accommodate different oil pans and headers
• Center relief milled to avoid grinding factory mounts
• Direct-bolt pattern compatibility with common SBC/BBC mount locations

What hardware and finish come with the adapter plates?

Each kit ships complete with the hardware needed for installation so you can bolt the plates to the motor and chassis without hunting down specialty fasteners. The plates are CNC-milled from aluminum for consistent hole alignment and repeatable fitment.

• Includes 2 adapter plates, 8 flat-head bolts, and 6 flange M10-1.5 bolts
• Plates are M10-threaded to accept included flange bolts
• Billet aluminum construction resists warping and eases installation
• OEM-style tolerances for accurate, repeatable positioning

Will I need to modify my existing mounts or frame?

No grinding is required for a flush fit in many applications because the plates have a machined opening to clear the hump on the back side of small-block mounts. Some installations with non-standard mounts or heavy custom work may still require minor clearancing.

• Center opening machined to clear SBC/BBC mount humps
• Designed to fit a wide range of headers and steering boxes without trimming
• Four adjustable positions reduce the need for trial-fit modifications
• Minor vehicle-specific adjustments possible on heavily modified frames

How does adjustability help with exhaust, oil pan, and steering clearance?

The four selectable mounting positions provide incremental shifts in engine height and fore/aft placement so you can find the best compromise between header fitment, oil pan clearance, and steering link geometry. This flexibility simplifies mock-ups and reduces costly rework.

• Four indexed slots allow fine-tuning for header and pan clearance
• Helps avoid interference with steering boxes and crossmembers
• Reduces need for aftermarket narrow oil pans or custom steering arms
• Works with a wide range of LS engine blocks and accessory locations

Who is this for? These adapter plates are aimed at DIY engine-swappers, restorers, and fabricators converting classic SBC/BBC vehicles to any common LS family engine. If you want CNC-accurate aluminum brackets, included hardware, and four-position adjustability to minimize clearancing and simplify installation, this kit is built to streamline an LS swap while preserving factory mount locations. For questions about fitment on a specific chassis or engine variant, contact Yoursme support before installation.