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1955-1957 Chevy LS Conversion Kit


1955-1957 Chevy LS Conversion Kit
Purchase 1955-1957 Chevy LS Conversion Kit
  • 1955-1957 Chevy LS Conversion Kit

  • $529.00

    SKU: LSX15

  • Select Transmission:  

LS Conversion Kit for 1955-57 Tri-Five Chevy by MuscleRods

Achieve flawless drivetrain alignment in your 1955 to 1957 Chevy non convertible model with MuscleRods precision mounts and brackets that eliminate fit issues and prevent unwanted vibration. A simplified installation process accommodates T56 4L60E and 4L80E transmissions without any transmission tunnel modifications, saving time on assembly. Constructed in the USA and compatible with standard or LH8 oil pan configurations, this kit ensures reliable performance and effortless integration.

Complete MuscleRods LS Engine Swap Kit for Tri-Five Chevy

Every 1955 to 1957 Chevy chassis presents a unique set of clearance and angle challenges when hosting an LS V8, and the 1955-1957 Chevy LS Conversion Kit addresses this by aligning engine and transmission precisely within the stock frame rails. Built around precision frame mounts and a stamped steel crossmember, this kit installs directly on factory rails and supports T56, 4L60E and 4L80E transmissions without any tunnel modification, clearing deeper GM LH8 oil pans to preserve classic hood contours. It also isolates vibration through polyurethane mount inserts that absorb engine movement and reduce driveline stress, ensuring a quiet ride in your Tri Five chassis. MuscleRods includes every USA made bracket and grade 8 hardware set plus spacers to guide novice and veteran builders alike through a consistent bolt on process that keeps tolerances tight and cuts installation time.

Precision Drivetrain Alignment for Smooth Operation

The conversion kit locates the LS engine and chosen transmission at the exact angle required to match the rear pinion, ensuring torsion on driveshaft joints is minimized. This alignment helps prevent torque steer and driveline lash when accelerating or decelerating in your Tri Five chassis. By maintaining factory frame rail contours, it delivers consistent geometry across multiple builds. The result is a seamless connection from engine output to rear end in classic Chevy cars without vibration issues.

Comprehensive Hardware Pack for a Streamlined Fit

Every mounting component is supplied so you can complete the swap without hunting for adapters or brackets. The kit includes motor mounts that bolt direct to the block and frame brackets that slot onto the existing rails, as well as a stamped steel crossmember fitted to OEM bolt holes. Transmission crossmember plates and a polymer mount come with spacers sized to control height precisely. This ready to install system guides even first time builders through a secure fit in a few straightforward steps.

Deep Sump Oil Pan Clearance Preserving Hood Profile

Engineering the crossmember and bracket geometry around a GM LH8 style pan allows use of a larger fluid capacity sump without trimming the tunnel or hood. This focus on clearance makes room for deep pans and low profile intakes while retaining the classic top line. You gain the benefit of improved oil control under high lateral loads, useful for spirited street driving or occasional track runs. The design respects original body proportions to keep the iconic Tri Five appearance intact.

Durable Steel Components with Vibration Damping

Laser cut from heavy gauge steel and formed to tight tolerances, the mounts and crossmember offer strong support for modern LS torque. Each bracket undergoes stamping to preserve dimensional accuracy and is heat treated for strength. A polyurethane insert in the transmission mount cushions engine movement and shields the chassis from harsh impulses. This isolation extends driveline life and contributes to quieter operation under load.

Built with exacting standards for precise fit and quiet operation this kit ensures a straightforward installation; for a more robust option where you select each component to match your build see our Complete LS Swap Kits - LS Kit Builder.

Specifications

  • SKU: LSX15
  • Swap Engine: LS
  • Body Type: Tri-Five Chevy
  • Brand: Muscle Rods
  • Compatible Engine Models: Most Gen III/IV LS Engines (e.g., LS1, LS2, LS3, 5.3L, 6.0L) when used with BRP/Muscle Rods LH8 GM Oil Pan, and appropriate low-profile intake for Tri-Five Chevy hood clearance. Excludes convertibles.
  • Compatible Transmissions: 4L60E, 4L80E (without tunnel modifications); Other transmission types may require adjustments.
  • What's Included:
    • (2) Motor Mounts
    • (2) Frame Brackets
    • (1) Transmission Crossmember
    • (2) Transmission Crossmber Brackets
    • (1) Polyurethane Transmission Mount and Spacers
    • (1) Installation Bolt Pack

Key Features

  • Perfect fit for 1955-1957 Chevrolet non-convertible models
  • Maintains correct drivetrain angle to prevent unwanted vibrations
  • Plug-and-play installation with T56, 4L60E, and 4L80E transmissions
  • Eliminates the need for transmission tunnel modifications
  • Compatible with high-clearance oil pan and optional LH8 pan
  • Proudly made in the USA

Benefits

  • Eliminates fitment issues on 1955-57 Chevy non-convertibles
  • Ensures smooth driving by preventing unwanted drivetrain vibrations
  • Speeds up installation with plug-and-play support for T56, 4L60E, and 4L80E
  • Avoids transmission tunnel modifications for hassle-free setup
  • Offers flexibility with high-clearance or optional LH8 oil pans
  • Delivers reliable performance through USA-made construction

This Item Assigned to Category and Also Fits:

Description

Complete MuscleRods LS Engine Swap Kit for Tri-Five Chevy

Every 1955 to 1957 Chevy chassis presents a unique set of clearance and angle challenges when hosting an LS V8, and the 1955-1957 Chevy LS Conversion Kit addresses this by aligning engine and transmission precisely within the stock frame rails. Built around precision frame mounts and a stamped steel crossmember, this kit installs directly on factory rails and supports T56, 4L60E and 4L80E transmissions without any tunnel modification, clearing deeper GM LH8 oil pans to preserve classic hood contours. It also isolates vibration through polyurethane mount inserts that absorb engine movement and reduce driveline stress, ensuring a quiet ride in your Tri Five chassis. MuscleRods includes every USA made bracket and grade 8 hardware set plus spacers to guide novice and veteran builders alike through a consistent bolt on process that keeps tolerances tight and cuts installation time.

Precision Drivetrain Alignment for Smooth Operation

The conversion kit locates the LS engine and chosen transmission at the exact angle required to match the rear pinion, ensuring torsion on driveshaft joints is minimized. This alignment helps prevent torque steer and driveline lash when accelerating or decelerating in your Tri Five chassis. By maintaining factory frame rail contours, it delivers consistent geometry across multiple builds. The result is a seamless connection from engine output to rear end in classic Chevy cars without vibration issues.

Comprehensive Hardware Pack for a Streamlined Fit

Every mounting component is supplied so you can complete the swap without hunting for adapters or brackets. The kit includes motor mounts that bolt direct to the block and frame brackets that slot onto the existing rails, as well as a stamped steel crossmember fitted to OEM bolt holes. Transmission crossmember plates and a polymer mount come with spacers sized to control height precisely. This ready to install system guides even first time builders through a secure fit in a few straightforward steps.

Deep Sump Oil Pan Clearance Preserving Hood Profile

Engineering the crossmember and bracket geometry around a GM LH8 style pan allows use of a larger fluid capacity sump without trimming the tunnel or hood. This focus on clearance makes room for deep pans and low profile intakes while retaining the classic top line. You gain the benefit of improved oil control under high lateral loads, useful for spirited street driving or occasional track runs. The design respects original body proportions to keep the iconic Tri Five appearance intact.

Durable Steel Components with Vibration Damping

Laser cut from heavy gauge steel and formed to tight tolerances, the mounts and crossmember offer strong support for modern LS torque. Each bracket undergoes stamping to preserve dimensional accuracy and is heat treated for strength. A polyurethane insert in the transmission mount cushions engine movement and shields the chassis from harsh impulses. This isolation extends driveline life and contributes to quieter operation under load.

Built with exacting standards for precise fit and quiet operation this kit ensures a straightforward installation; for a more robust option where you select each component to match your build see our Complete LS Swap Kits - LS Kit Builder.

Features
  • Perfect fit for 1955-1957 Chevrolet non-convertible models
  • Maintains correct drivetrain angle to prevent unwanted vibrations
  • Plug-and-play installation with T56, 4L60E, and 4L80E transmissions
  • Eliminates the need for transmission tunnel modifications
  • Compatible with high-clearance oil pan and optional LH8 pan
  • Proudly made in the USA
Benefits
  • Eliminates fitment issues on 1955-57 Chevy non-convertibles
  • Ensures smooth driving by preventing unwanted drivetrain vibrations
  • Speeds up installation with plug-and-play support for T56, 4L60E, and 4L80E
  • Avoids transmission tunnel modifications for hassle-free setup
  • Offers flexibility with high-clearance or optional LH8 oil pans
  • Delivers reliable performance through USA-made construction
What's Included
  • (2) Motor Mounts
  • (2) Frame Brackets
  • (1) Transmission Crossmember
  • (2) Transmission Crossmber Brackets
  • (1) Polyurethane Transmission Mount and Spacers
  • (1) Installation Bolt Pack
Specifications
  • SKU: LSX15
  • Brand: Muscle Rods
  • Swap Engine: LS
  • Body Type: Tri-Five Chevy