Swapping an LS engine into your project car is one of the most rewarding upgrades you can do — if you do it right. LS engines are powerful, reliable, and incredibly versatile. But with so many components involved, it’s easy to overlook important steps.

What You Need for a Successful LS Swap

1. Engine & Transmission Combo
Choose from LS1, LS3, LQ4, or others depending on your goals and budget. Make sure you have a compatible transmission (T56, 4L60E, etc.).

2. Engine Mounts and Crossmembers
You’ll need model-specific swap mounts and possibly a crossmember to fit the LS into your chassis. Adjustable mounts offer more flexibility for clearance.

3. ECM & Wiring Harness
Standalone or reworked factory harnesses make wiring manageable. Pre-labeled harnesses are perfect for first-time swappers.

4. Fuel System
EFI demands higher pressure than a carb system. Upgrade to a high-pressure pump, return system, and regulated lines.

5. Cooling System
LS engines run hot. Use a radiator with at least dual electric fans and proper shrouding to ensure reliable cooling.

Mistakes to Avoid

• Using the wrong oil pan

• Skipping fuel system upgrades

• Overlooking driveshaft and throttle cable compatibility

• Cheap wiring jobs that cause never-ending issues

Why Billy’s Speed Shop?
We stock everything from LS swap kits to fuel systems and wiring harnesses. Whether it’s your first swap or your tenth, we’re here to make it easy — and reliable.