This 1971-1976 Impala LS conversion kit mounts an LS engine and transmission in the 1971-1976 Chevy Impala B-Body. When you order the Muscle Rods LSX30 kit, choose Coupe or Convertible, then your transmission: T-56 or TR-6060, 4L60E to 4L70E, 4L80E or 4L85E, 6L80E to 10L90E, TH400, or Powerglide, TH350 or 4-speed.
What's in the kit
- Two motor mounts
- Two frame brackets
- Transmission crossmember
- Two crossmember brackets
- One extra frame bracket
- Polyurethane transmission mount
- Installation hardware pack
The crossmember brackets mount through the original crossmember holes, with different positions for the different frames used under these cars. The kit is designed around factory suspension and steering parts.
Transmission options
Each body style is offered with T-56 or TR-6060, 4L60E to 4L70E, 4L80E or 4L85E, 6L80E to 10L90E, TH400, or Powerglide, TH350 or 4-speed.
Does my transmission need tunnel work?
- 4L60E: fits with no tunnel changes. The guide says the 4L80E also fits.
- 6L80E and 6L90E: tunnel changes at the tail shaft housing area.
- T-56: tunnel changes around the shifter.
Which oil pan works?
The install guide used the LH8 oil pan and recommends the BRP Moroso pan for lowered cars. Mast Motorsports and Holley pans also fit.
Headers, A/C and accessories
- A 1998-2002 F-Body alternator clears the frame. The 1998-2002 F-Body A/C does not; use the Muscle Rods high mount A/C bracket.
- Muscle Rods A/C and alternator/power steering brackets clear in short, medium and long spacing.
- Muscle Rods mid length and long tube headers (MR45546 to MR45596) are recommended. Long tubes need the front crossmember frame brace removed; mid lengths do not.
- The stock column shift linkage clears both headers and lines up with the 4L60E shift shaft.
- Ignition coils clear the factory A/C box and power brake booster in their stock location.
Read the 1971-1976 B-Body Impala LS install guide for the full parts list and install steps, or add headers, a fuel tank and more in the complete LS swap kit builder.