The Muscle Rods LSX23 kit is a C3 Corvette LS conversion kit for the 1968-1982 Chevy Corvette. It mounts an LS engine and transmission in the C3 chassis. Order it for an LS with a T-56, or an LS with a 4L60E to 4L70E.
What's in the kit
- Two motor mounts
- Transmission crossmember bracket
- Two transmission crossmember bracket spacers
- Polyurethane transmission mount and spacers
- Installation hardware pack
The motor mounts bolt to the factory frame mount perches. The transmission bracket bolts to your factory Turbo 400 style crossmember and only works with that crossmember. Some late model crossmembers do not have the correct mounting tabs and must be changed for an earlier crossmember, which may require welding.
Transmission options
Choose LS and T-56, or LS and 4L60E to 4L70E. With an automatic, the 1/4 inch spacers go between the tailshaft housing and the preload plate. The kit does not work with the factory clutch Z-bar, and driveshaft length changes from original.
Which oil pan works?
Use the F-Body oil pan or the Cadillac CTS-V oil pan. The F-Body pan gives a little more ground clearance but does not clear the factory power assist slave cylinder.
Headers, A/C and accessories
- Requires 1998-2002 F-Body accessories.
- A low-mount A/C compressor does not clear the frame. A Kwik Performance top-mount A/C bracket is needed to run A/C.
- Muscle Rods mid-length headers bolt in with this kit and work with T-56, 4L60E and 4L65E transmissions.
- Some header installs need the starter, valve cover or spark plugs removed.
- Designed around factory suspension and steering components.
Read the 1968-1982 Corvette LS install guide before you order. To add headers, fuel, cooling and more, build your kit in the complete LS swap kit builder.