MuscleRods LS Engine Swap Kit for Impala B-Body 1971-1976
For Impala B-Body projects dating from 1971 to 1976 that call for modern LS power, securing exact engine mounts and frame clearance is crucial. MuscleRods' LS Conversion Kit delivers precision machined brackets and hardware to preserve the factory drivetrain angle while accommodating Moroso and LH8 oil pans without any transmission tunnel modifications. Compatible with both 4L60E and 4L80E gearboxes, this kit bolts to stock locations for a smooth operation without vibration.
Precision Engineered Drivetrain Alignment
This kit is built to maintain the factory drivetrain angle, ensuring the LS engine and automatic transmission line up perfectly with the driveshaft. By preserving this geometry, the design minimizes vibration and stress on universal joints under load. The precision-machined mounting points and sturdy frame brackets work together to provide a rock solid power delivery platform. Installers will notice smoother throttle response and reduced wear, since the engine sits exactly where it should for optimal drivetrain health.
Seamless Transmission Tunnel Integration
Designed to accept both 4L60E and 4L80E transmissions without any modifications to the tunnel, this kit slashes installation time and expense. The custom crossmember and polyurethane transmission mount bracket bolt directly to stock frame holes, positioning the gearbox at the ideal height and angle. As a result, there is no need to cut or reshape the tunnel-simply attach the supplied hardware pack and move on to wiring and plumbing. This straightforward approach keeps the chassis structure intact and preserves factory floor strength.
Tailored Chassis Clearance Options
Whether you choose the taller Moroso oil pan or the lower LH8 design, the brackets adapt to both profiles without altering the frame rails. This flexibility lets you set ride height and sump clearance to match your driving style, from street cruising to light off-road use. The mount geometry ensures the oil pan maintains proper ground clearance under uneven surfaces, while still fitting beneath the original B-Body crossmember. By accommodating varied pan depths, the kit lets you optimize engine placement for both performance and protection.
Comprehensive Kit with US Craftsmanship
All mounting components arrive in one complete package, including motor mounts, frame brackets, crossmember hardware and a dedicated polyurethane transmission mount. Each part is manufactured in the USA to exacting standards and inspected before shipping for guaranteed fitment. The use of premium materials throughout increases resistance to fatigue and corrosion, ensuring a durable swap solution. Installers appreciate having every necessary bracket and bolt on hand, leading to a clean build with no last-minute sourcing headaches.
Count on MuscleRods precision for a seamless LS swap. For a more robust kit that lets you customize parts to suit your needs see our Complete LS Swap Kits - LS Kit Builder.