If you’re pulling the 350 out of your 73–87 C10 and dropping in an LS, you’ve made a great choice. The LS is lighter, more powerful, and more reliable. Here’s your complete parts checklist.
Why Swap the SBC 350 for an LS?
- The LS makes more power from the factory
- Better fuel economy (EFI, tighter tolerances)
- Stronger bottom end
- Excellent aftermarket support
- Can retain AC, power steering, and accessories
Engine Options:
- LS1 5.7L (1997–2004 F-body, Corvette) – Most popular, great power potential
- LQ4 6.0L (truck engine) – More torque stock, iron block, cheaper
- LQ9 6.0L (truck engine) – Comes with LS2 rectangular port heads
- LM7 5.3L (truck engine) – Most common and cheapest LS to find
What You Need for the Swap:
Engine Mounts:
1973–1987 C10 LS Swap Engine Mount Kit – 2WD/4WD – Welds to the factory frame pads and accepts LS engine mount ears.
Transmission:
The LS mates easily to:
- 4L60E (bolt-in with no crossmember changes on most C10s)
- 4L80E (requires crossmember modification)
- T56 manual (requires tunnel modification)
- 700R4 (adapter required)
Wiring:
A standalone LS harness is the cleanest solution. See our wiring guide in the forum.
Fuel System:
You’ll need to convert to EFI fuel system:
- In-tank or inline EFI fuel pump (58–62 PSI rated)
- Return or returnless fuel system
- Fuel pressure regulator
Accessories:
The LS accessory drive (AC, power steering, alternator) is a different configuration from the SBC. Budget for a new accessory bracket kit or a serp belt conversion.
Exhaust:
LS headers for the C10 are widely available. Full-length Hedman or Hooker headers are popular choices.
Total Budget:
- Engine (junkyard): $500–$2,000 depending on mileage and source
- Complete swap parts (mounts, harness, fuel system): $1,000–$2,500
- Professional labor: $2,000–$5,000
What LS engine did you use in your C10? Share your build notes below!