Walk any SEMA aisle and you will see the same question answered a dozen ways: what goes between the framerails? On classic trucks, the answer used to be a small-block and that was that. Now builders have real choices, and the one you make decides your fuel system, cooling, wiring, and even your budget.
Pick the powertrain first. Everything else follows it.
The LS Swap: The Proven Default
The LS is the go-to for a reason. Parts are everywhere, the knowledge base is huge, and there is a swap solution for nearly every C10 problem. Builders at the show this year, including the 1973 C10 "Chasing Gold" with its LS-based powertrain, are still leaning on it.
- Good for: Drivers and restomods, first-time swappers, builds on a real budget.
- Watch for: Oil pan and accessory drive clearance, header choice, and a wiring and fuel plan from day one.
The LT Swap: Newer, Stronger, Pricier to Sort Out
Gen V LT engines are showing up in more classic trucks. One builder recently put a Gen V L83 with an eight-speed automatic under a 1971 C10, and last year's Young Guns winner at SEMA ran an LT4 with a 10-speed in a 1967 C10. They make great power and drive like a modern truck.
- Good for: Builders who want modern efficiency and refinement and are comfortable with a more involved electronics and fuel setup.
- Watch for: Direct injection means a higher-pressure fuel system and more complicated tuning than an LS. Plan for it early, not after the engine is in.
The EV Conversion: Quiet, Clean, and Specialized
Shops like Legacy EV have shown fully electric C10 builds at SEMA, and they are impressive. But SEMA's own industry update points out that EV adoption is slowing amid cost concerns and infrastructure challenges. For a home builder, an EV conversion is usually the most specialized and expensive route, with fewer off-the-shelf parts.
- Good for: Builders who want instant torque and silence and have the budget and support to do it right.
- Watch for: Battery packaging, weight, cooling, and getting service when something needs fixing.
How to Choose
- Want the most parts support and the easiest path? Go LS.
- Want modern power and don't mind more electronics and fuel complexity? Look at LT.
- Want a statement build and have the budget? Look at an EV conversion with a shop that does them.
Plan the Whole Truck Around It
Whatever you choose, build the support systems to match. A stronger engine needs brakes and steering that can handle it, a fuel and cooling setup that keeps up, and wiring that is clean from the start. Browse our engine and drivetrain parts to see what a swap really takes.
Always verify fitment for your truck's year and generation before ordering. Not sure which way to go? Call 805-272-6924 or email contact@dondottasolutions.com and talk it through with the crew.
