An LS in a C10 is not exotic anymore. Doing it so the truck drives, cools, and steers is still a shop job.
Decide these first
- Year of truck. 60–66, 67–72, and 73–87 do not share the same engine bay problems.
- Oil pan and crossmember. This pair decides whether the engine sits where it should or fights the steering.
- Transmission. 4L60/65/80, 6L80, or a manual — each changes the tunnel, mounts, and shifter.
- Fuel and cooling. Return vs returnless, radiator size, electric fans that actually pull air through a C10 core support.
- Wiring. A clean harness and a plan for gauges beat a pile of relays hidden in the glovebox.
What we will not skip
Clearance for the oil pan. Driveshaft angles after the truck is at ride height — especially on air. Exhaust that does not toast the cab. A pedal box and steering shaft that still work after the motor is in.
If you already bought a “universal” swap kit, send photos before you weld mounts. We build LS C10s in-house and sell the crossmember package we actually use.
Ready to talk about a truck? Send a build inquiry.