MuscleRods LS Engine Swap Kit for 1958-1964 Chevy Impala B-Body
When retrofitting a modern LS engine into a classic 1958-1964 Impala B-Body project, the 1958-1964 B-Body LS Conversion Kit streamlines the process by securing the powertrain crossmember directly to the factory rails without altering the transmission tunnel. It holds the engine and chosen gearbox at factory angles to curb vibration and limit stress on universal joints and bearings under load. Brackets cut to match common F Body oil pan contours ensure proper hood clearance and simplify plumbing and wiring tasks during assembly. Designed by MuscleRods, this kit supports T56, 4L60E and 4L80E transmissions to cut mockup time and keep your swap moving forward.
Precision Engine and Transmission Geometry
The kit secures the LS engine and selected gearbox at factory specified angles, locking drivetrain geometry within exact tolerance. This precision alignment minimizes torsional vibration and uneven load on universal joints, which in turn reduces wear on bearings over time. Builders benefit from calibrated spacer blocks and CNC laser cut brackets that eliminate guesswork and trial fits. As a result, the swap delivers smooth power delivery under acceleration and preserves component life by preventing stress spikes in the driveline.
Seamless Frame Rail Integration Without Tunnel Cuts
Each mounting bracket is crafted from laser cut high strength steel to bolt directly to the original frame rails of 1958 to 1964 B Body chassis. This direct bolt in design removes the need for modifying the transmission tunnel or floor structure, preserving factory sheet metal integrity and interior space. CNC precision ensures the mounting points align perfectly with factory rails, simplifying the installation process. Using grade eight fasteners and steel reinforcement, the kit delivers reliable joint integrity that stands up to daily driving demands.
Optimized F Body Oil Pan Fit for Hood Clearance
By matching common F Body oil pan profiles, the kit offers proper sump spacing to clear the stock hood on Impala projects. The powder coated brackets are cut to the exact contour of the F Body pan, ensuring plumbing and sensor ports remain accessible without interference. This targeted fitment reduces mockups and adjustment cycles, letting builders focus on wiring and cooling system layout. As a result, underhood real estate is maximized and the final assembly retains the classic silhouette of the original Impala.
Transmission Versatility for Common LS Gearboxes
Support for T56, 4L60E and 4L80E transmissions ensures compatibility with a broad selection of GM gear sets. The crossmember accepts standard third and fourth generation LS bell housing patterns when paired with the recommended pan and intake orientation. This adaptability eliminates the need for special adapter plates in most cases and lets enthusiasts choose the gearing that suits performance goals. Future gearbox swaps can be completed quickly by reusing the same mounting points and hardware pack.
Trust MuscleRods reliability for your LS swap. To explore a more robust kit that lets you select the ideal parts for your needs see our Complete LS Swap Kits - LS Kit Builder.