The Muscle Rods LSX6 kit is a G-Body LS conversion kit for the 1978-1988 Monte Carlo, 1978-1987 Regal, 1982-1987 Grand National, 1978-1987 Cutlass, 1978-1987 Grand Prix, 1978-1983 Malibu, and 1978-1987 El Camino and Caballero. Pick the transmission behind your LS, since G-Body crossmembers differ by transmission.
What's in the kit
- Two motor mounts and two frame brackets
- Transmission crossmember with two crossmember brackets
- Driver-side support Z bracket
- Polyurethane transmission mount and spacers
- Installation hardware pack
Frame mounts bolt into existing frame holes. G-Body frames came with a full, split or short driver-side shelf. Short shelf frames must be drilled for the extra crossmember bracket.
Transmission options
Order the kit for an LS paired with a T-56 or TR-6060, 4L60E to 4L70E, 4L80E or 4L85E, 6L80E or 8L90E, TH400, or Powerglide, TH350 or 4-speed.
Does my transmission need tunnel work?
- Automatics: no transmission tunnel modification.
- T-56: a new shifter hole is required.
- Because bodies, body mounts and frames vary, some cars may still need the tunnel or firewall clearanced.
Which oil pan works?
The kit is made for the GM LH8 oil pan. A Cadillac CTS-V pan can be used on lowered cars for extra ground clearance.
Headers, A/C and accessories
- Muscle Rods G-Body headers clear the factory A/C box, power steering box and power brakes.
- A 1998-2002 F-body low-mount A/C compressor may need the frame notched for A/C line clearance.
- Headers are designed around a floor shifter. Column shift linkage needs changes.
- The kit will not work with the factory clutch Z-bar, and driveshaft length will change.
- Designed around factory suspension and steering.
Read the 1978-1988 G-Body LS install guide before you order. Need a pan? See the LH8 oil pan, or build your swap in the complete LS swap kit builder.