Complete MuscleRods LS Engine Swap Kit for Caprice 1977-1990 and Impala 1977-1985
Swapping an LS powerplant into a B-Body Caprice or Impala often stalls when stock brackets fail to match the original frame geometry, and the 1977-1990 B-Body Caprice LS Conversion Kit delivers custom motor and transmission mounts that bolt directly to these frames without modifying the tunnel. This solution preserves the factory orientation for both engine and transmission to maintain drivetrain alignment, cutting vibration and reducing chassis strain. Installers benefit from support for 4L60E and 4L80E transmissions along with the choice of a tall oil pan or LH8 design for optimal underbody clearance. Manufactured in the USA by MuscleRods from precision steel, every bracket and crossmember arrives ready for a bolt in swap and includes all required hardware for a straightforward fit.
Precision Alignment for LS Powertrain Integration
Preserving the factory engine and transmission angle on 1977 to 1990 B Body Caprice and 1977 to 1985 Impala frames is critical for driveline health. By matching the original orientation, universal joints operate in their optimal range of motion, preventing binding under torque and reducing vibration throughout the powertrain. This exact alignment limits stress on the chassis and suspension mounts, offering a smoother ride and more predictable handling under load. Installers no longer need to guess bracket placement or resort to trial fitting, as every mounting point is engineered to the precise frame geometry of these classic models.
Polyurethane Mount System for Vibration Isolation
Replacing standard rubber components with a durable polyurethane transmission mount and spacer assembly delivers a significant improvement in both longevity and noise control. Polyurethane resists degradation from oil, coolant, and road contaminants, so it retains its shape and support over thousands of miles. During hard acceleration or spirited driving the transmission remains firmly in place, yet transient harshness is still absorbed before it can transfer into the passenger cabin. Over time this material choice prevents sagging or flattening, ensuring consistent isolation and minimizing drivetrain chatter through repeated cycles.
Adjustable Oil Pan Compatibility for Underbody Clearance
The conversion kit's crossmember and frame brackets are designed to accept either a tall clearance oil pan or the LH8 style without any tunnel trimming. Builders can tailor ground clearance and sump volume to suit street or track applications by simply choosing the appropriate pan. This flexibility ensures that suspension travel, steering travel, and frame rail height remain uncompromised, even on lowered vehicles or those running aftermarket geometry. The result is a customized balance of oil capacity and vehicle ride height secured without cutting, welding, or guesswork during installation.
American Made Steel Brackets for Consistent Fitment
Each motor mount, frame bracket, and crossmember is manufactured in the USA from precision laser cut steel plate to exacting tolerances. By maintaining strict quality control at every stage of production, the kit delivers a repeatable, true bolt in installation with no need for trial fitting or modification of the transmission tunnel. All necessary fasteners and hardware are included in the package, so installers avoid multiple trips to the parts store and can complete the swap in a single build session. This domestic manufacturing approach ensures reliable performance and longevity under demanding use.
Count on MuscleRods for precise fit and consistent performance. To access a more robust kit where you can build this same kit but this is a customizable kit where the user can select their own parts to better suit their needs see our Complete LS Swap Kits - LS Kit Builder.