Swapping an LS engine into older vehicles is a popular upgrade for power and reliability. To make the swap successful, selecting the right engine mounts, adapter plates, and accessories is crucial for proper fitment and performance. This article reviews top products designed specifically for LS engine swaps and accessories that ensure compatibility with various chassis and transmission setups.
| Product Name | Brand | Key Features |
|---|---|---|
| LS Swap Motor Mounts Compatible with 1973-1998 Square Body / OBS Chevy GMC Truck | Goopool | Adjustable mounts, fit LS Series engines, compatible with multiple transmissions, designed for Chevy/GMC trucks 1973-1998 |
| LS Swap Motor Mounts Adapter Plates – Universal Small Block LS Conversion | Yoursme | Bolts LS engine into SBC chassis, OEM specs, moves crankshaft centerline up 0.17″ |
| ICT Billet SBC Vehicle to LS Engine Motor Mount Adapter Plate | ICT Billet | Made in USA billet aluminum, OEM spec fitment, shifts crankshaft centerline up 0.17″ |
| M12 1.5 Adapter to 3/8 NPT LS Engine Swap Coolant Sensor Adapter | Larlansz | Allows use of original coolant sensors, converts metric M12 ports to 3/8″ NPT, ideal for electric fan retrofits |
| maXpeedingrods LS Engine Swap Mount Adapter Kit for G-Body 1973-1988 | maXpeedingrods | Fits Gen3/Gen4 LS engines into 1973-1988 G-Body cars, powder-coated, corrosion resistant |
LS Swap Motor Mounts for 1973-1998 Square Body Chevy GMC Trucks
The Goopool LS Swap Motor Mounts offer a versatile and adjustable mounting solution designed for LS engine swaps in various Chevy and GMC trucks from 1973 to 1998. They feature slotted adjustability to fine-tune engine placement within the engine bay, ensuring compatibility with transmissions like 4L60E, TH350, TH400, and more.
These mounts support all Chevrolet LS Series engines such as LS1, LS2, LS3, LS6, LS7, LS9, and truck engines from 4.8L up to 6.2L produced between 1997 and 2014. The mounts are specifically compatible with OBS and Square Body configurations, including 2WD and 4WD full-size C/K trucks, Silverado, C10, Jimmy, and other models, providing a comprehensive fitting option for this popular swap setup.
Universal LS Swap Motor Mounts Adapter Plates for Small Block Chevy
Yoursme’s adapter plates allow LS series engines to be installed into vehicles originally equipped with Small Block Chevy engines using the existing mounts. Crafted with OEM specifications, these plates ensure a precise fit and maintain correct alignment by moving the crankshaft centerline up by 0.17 inches inside the vehicle frame.
The kit includes two adapter plates plus the necessary flat head and flange bolts for a secure installation. This universal solution simplifies the LS swap process for older cars and trucks, particularly when upgrading from SBC to LS powerplants.
ICT Billet SBC Vehicle to LS Engine Motor Mount Adapter Plate
The ICT Billet adapter plate is a billet aluminum solution manufactured in the USA, providing high strength and precision for LS engine swaps into Small Block Chevy chassis. Made from aerospace-grade 3/8″ thick aluminum, this adapter plate also moves the crankshaft centerline up by 0.17 inches to match LS engine dimensions within the SBC vehicle frame.
Its exact OEM specification machining ensures optimal fitment without the need for modifications, making it an excellent choice for builders seeking durable, high-quality swap components made domestically.
LS Engine Swap Coolant Sensor Adapter M12 1.5 to 3/8 NPT
Larlansz’s coolant sensor adapter solves a common problem faced during LS swaps: integrating factory coolant sensors with metric-threaded LS cylinder head ports into vehicles using standard 3/8″ NPT fittings. This adapter converts the M12-1.5 metric thread to 3/8″ NPT, allowing original sensors or aftermarket ones with this thread size to be used seamlessly.
Ideal for retrofitting electric fans and retaining factory coolant gauges, this adapter ensures accurate temperature readings and system compatibility in LS engine swaps. Customers should verify sensor length before purchase for proper installation depth.
maXpeedingrods LS Engine Swap Mount Adapter Kit for G-Body
The maXpeedingrods adapter kit is designed specifically for LS engine swaps into 1973-1988 G-Body cars like the Chevrolet Monte Carlo. Compatible with Gen3 and Gen4 LS engines—including LS1, LS2, LS3, LS6, LQ4, and LQ9—this mount adapter is premium quality with a powder-coated finish for corrosion resistance.
Including durable hardware and precision-machined spacers, this kit simplifies the LS swap process on classic G-Bodies, helping maintain proper mounting geometry and alignment essential for optimal engine and chassis performance.
Buying Guide for LS Engine Swaps
Choosing the correct components for an LS engine swap requires careful consideration to ensure compatibility, ease of installation, and long-term reliability. Here are key factors to consider:
Vehicle and Engine Compatibility
Verify that mount kits and adapter plates are specifically designed for your vehicle’s make, model, and year range. Many mounts are tailored for particular chassis configurations, such as Square Body Chevy trucks, G-Body cars, or Small Block Chevy frames. Similarly, ensure the product supports your LS engine variant (e.g., LS1, LS3, LQ4).
Transmission Fitment
Check that mounts allow for the transmission you plan to use—be it manual or automatic. Some mounts specify compatibility with transmissions like TH350, 4L60E, or 4L80E. Adjustable mounts help accommodate different transmission sizes and bellhousing offsets.
Mounting Adjustability
Adjustable mounts with slotted holes provide flexibility in positioning the engine for ideal alignment to the chassis and driveline. This is important for maintaining proper driveshaft angles and clearance within the engine bay.
Material Quality and Durability
Look for mounts and adapter plates made from billet or cast aluminum, steel, or other durable materials. Powder-coated or corrosion-resistant finishes extend the lifespan of components exposed to heat and vibration.
Additional Accessories
For a complete LS swap, consider accessories such as coolant sensor adapters to integrate newer LS heads with older sensors or aftermarket gauges. Oil pans specifically designed for LS swaps provide proper clearance on classic chassis and enhance cooling efficiency.
Ease of Installation
Some products come as complete kits with all necessary bolts and hardware, streamlining installation. OEM specification manufacturing typically reduces the need for vehicle modifications.
By focusing on these considerations and selecting high-quality products tailored for your application, you can achieve a smooth, reliable, and well-fitted LS engine swap for your classic or modern vehicle.