Are LS Engines Taking Over Hot Rodding? Better Performance or Boring Builds?

There was a time when walking through a car show meant seeing something different under nearly every hood.

Tunnel rams, dual four-barrel carburetors, polished blowers sticking through hoods, big-block Chevys, small-block Fords, and all kinds of wild engine combinations.

You never knew what somebody had built until they opened the hood.

Today, things look a little different.

Walk through a classic car show, and you'll find plenty of beautiful old cars running modern engines. LS swaps, Ford Coyotes, and modern Hemis have become popular choices for everything from muscle cars and street rods to classic pickup trucks.

There's no question these engines deliver impressive performance.

But here's the question I've been thinking about:

Are modern engines making classic hot rods better, or are we losing some of the character that made hot rodding special?

Watch: Are LS Engines Making Classic Cars Boring?

 

In this short video, I ask a simple question: Does a modern engine make an old-school hot rod better, or does it just make it more boring?

It's a subject that gets enthusiasts talking, and there are good arguments on both sides.

Why Has the LS Engine Become So Popular?

The General Motors LS engine family changed the hot rodding world.

Introduced in the 1997 Chevrolet Corvette, the Gen III small-block platform quickly became popular with performance enthusiasts because it offered an impressive combination of horsepower potential, relatively compact packaging, reliability, and aftermarket support.

Today, LS engines can be found in just about everything imaginable.

Classic Camaros, Chevelles, Novas, C10 pickups, street rods, and even vehicles that never came with a Chevrolet engine.

And it's easy to understand why.

A properly selected LS engine offers several advantages:

• Strong horsepower potential without extensive internal modifications.

• Modern electronic fuel injection and ignition control.

• Good reliability and everyday drivability.

• Excellent aftermarket parts availability.

• Numerous options for engine mounts, wiring harnesses, transmissions, and accessories.

• Potentially better fuel economy than older performance combinations.

For somebody building a classic car they intend to drive regularly, those are compelling advantages.

And General Motors isn't alone.

Ford's Coyote engines and modern Chrysler Hemis have also become popular choices for enthusiasts looking to combine classic styling with modern performance.

Remember When Engine Builds Were Part of the Show?

One of the things I've always enjoyed about hot rodding is the creativity.

You'd walk up to a car, look under the hood, and find something completely unexpected.

Maybe it was a tunnel ram with two four-barrel carburetors.

Maybe it was a big roots-style blower.

Maybe somebody had built a wild small-block with mechanical fuel injection or stuffed a massive big-block into a car that barely had room for it.

And let's not forget the Pro Street era, when oversized rear tires, aggressive engine combinations, and blowers sticking through the hood were practically part of the uniform.

Those builds weren't always practical.

Some were temperamental. Some were difficult to tune. Some didn't particularly like sitting in traffic.

But they had personality.

And for a lot of enthusiasts, that personality was part of the experience.

There was something special about walking around a car show and seeing the different ways people approached making horsepower.

Are We Losing the Character of Our Old Cars?

This is where the conversation gets interesting.

A modern engine can completely transform the way an old car drives.

Electronic fuel injection, modern ignition systems, and computer-controlled engine management can make a classic car easier to start, smoother to drive, and more dependable.

But there's another side to that equation.

Older engines have their own sounds, smells, vibrations, and mechanical characteristics.

A carbureted big-block with a healthy camshaft has a completely different personality than a stock LS engine.

They drive differently. They sound differently. They respond differently.

And yes, they have their quirks.

Personally, I've always appreciated those quirks. They're part of what makes these old machines interesting.

That doesn't necessarily make traditional engines better.

It makes them different.

And when you're building a hot rod, sometimes the experience matters just as much as the horsepower.

Is an LS Swap Really the Easy Way Out?

I've heard people suggest that putting an LS engine into a classic car is taking the easy way out.

I don't think that's a fair argument.

Anybody who's installed a modern engine into an older vehicle knows there's more involved than simply dropping an engine between the frame rails.

Depending on the vehicle and engine package, you may be dealing with:

• Custom engine mounts and transmission crossmembers.

• Wiring harnesses and electronic engine controls.

• High-pressure fuel delivery systems.

• Exhaust fabrication and clearance issues.

• Cooling system modifications.

• Oil pan and steering clearance.

• Transmission compatibility and driveshaft modifications.

• Accessory drive systems and electrical integration.

A properly executed modern engine swap takes planning, mechanical knowledge, and attention to detail.

There's craftsmanship involved.

But there's also craftsmanship in building and tuning a traditional engine combination.

They're simply different approaches to achieving the same goal: building a car you enjoy.

Traditional Small-Block Chevy vs. Modern LS: Which Would You Choose?

Here's where things get interesting for anyone planning a classic car project.

Let's compare two popular approaches to building a Chevrolet-powered hot rod.

One uses the traditional carbureted small-block Chevy. The other takes advantage of modern LS engine technology.

Both are capable of making serious horsepower, but they deliver very different ownership experiences.

Option 1: Traditional Small-Block Chevy 350 Crate Engine

Old-School Horsepower

The Chevrolet 350 small-block is one of the most recognizable engines in American hot rodding history.

It's compact, relatively straightforward to work on, and supported by an enormous aftermarket.

A traditional carbureted 350 crate engine is a great choice for somebody who wants the appearance and mechanical character of an old-school hot rod without necessarily rebuilding an engine from scratch.

Why choose a traditional 350?

• Classic small-block Chevy appearance.

• Familiar carburetor and distributor technology.

• Extensive aftermarket parts availability.

• Straightforward service and maintenance for experienced enthusiasts.

• A natural fit for many older Chevrolet applications.

• Plenty of opportunities for traditional performance modifications.

Whether you're building a classic Camaro, Nova, Chevelle, or C10 pickup, a properly selected 350 can deliver the sound and driving experience that made these cars famous.

Shop Traditional Chevy 350 Crate Engines at Summit Racing

Check the specific engine listing for horsepower, torque, included components, fuel requirements, and vehicle compatibility.

Option 2: Modern LS-Based Crate Engine

Modern Performance in a Classic Package

The LS engine family has become one of the most popular platforms for modern engine swaps.

With electronic fuel injection, modern ignition control, and excellent aftermarket support, an LS-based crate engine can provide impressive performance while retaining the classic appearance of the vehicle around it.

Depending on the engine selected, LS-based packages can deliver everything from mild street performance to serious horsepower.

Why choose a modern LS?

• Modern electronic fuel injection.

• Strong horsepower and torque potential.

• Excellent reliability when properly installed and maintained.

• Improved cold-start behavior and everyday drivability.

• Extensive aftermarket support for engine swaps.

• Compatibility with numerous modern transmission options.

For somebody building a classic car intended for regular driving, long-distance cruising, or modern restomod performance, an LS engine can be an excellent choice.

However, it's important to understand that a crate engine isn't always a complete drop-in package.

Depending on the application, you may still need an engine controller, wiring harness, fuel system upgrades, accessory drive components, exhaust modifications, and other installation parts.

Shop Modern LS Crate Engines at Summit Racing

Verify what's included in the engine package before purchasing. Not every LS crate engine includes the electronics and components required for installation.

Traditional 350 vs. Modern LS: At a Glance

Feature	Traditional Chevy 350	Modern LS
Fuel delivery	Typically carbureted	Electronic fuel injection
Ignition	Traditional distributor-based systems	Computer-controlled
Appearance	Classic hot rod	Modern performance
Tuning	Mechanical adjustments	Electronic calibration
Cold starts	May require choke and warm-up	Generally more consistent
Aftermarket support	Extensive	Extensive
Installation	Often simpler in older Chevy applications	May require additional systems
Driving character	Traditional V8 experience	Modern drivability
Performance potential	Excellent	Excellent

Neither engine is automatically the better choice.

A traditional 350 can be the perfect engine for somebody who wants an authentic old-school experience.

An LS can be the better fit for somebody who values modern drivability, electronic engine management, and contemporary performance.

And the final cost depends heavily on the specific engine package, vehicle, and installation requirements.

The real question isn't which engine makes more horsepower. It's which one makes the car more enjoyable for you.

Affiliate disclosure: Some product links in this article are affiliate links. If you make a qualifying purchase through one of these links, V-Twins to V-8s may earn a commission at no additional cost to you.

What Really Makes a Hot Rod Special?

I've spent more than 40 years working on cars, engines, and performance vehicles.

During that time, I've seen automotive technology change dramatically.

Carburetors gave way to electronic fuel injection. Mechanical ignition systems evolved into sophisticated electronic controls. Engines became more efficient, more powerful, and generally easier to live with.

And I've worked with both traditional and modern technology.

One thing I've learned is that everybody has a different idea of what makes a great build.

Some enthusiasts want maximum horsepower and reliability.

Others want period-correct components and the mechanical experience of an old-school engine.

Some want to drive their classics across the country without worrying about breakdowns.

Others enjoy the challenge of keeping traditional technology running exactly the way it was intended.

And some want a little of both.

That's what makes this hobby interesting.

There isn't one correct way to build a hot rod.

But I do wonder whether we're seeing less variety under the hood than we used to.

Better Performance or Just More Boring?

Modern engines have unquestionably brought impressive technology into the classic car world.

But horsepower numbers and reliability don't tell the entire story.

Sometimes it's the unusual engine combination, the sound of a big camshaft, or the sight of a blower sticking through the hood that makes you stop and look.

And sometimes it's a beautifully executed LS swap that deserves that same attention.

A well-built hot rod is still a well-built hot rod, regardless of what's powering it.

But that doesn't mean we can't have a good debate about it.

So here's my question:

Does a modern engine make an old-school hot rod better, or does it just make it more boring?

Are you an old-school carburetor and big-block enthusiast, or do you prefer modern fuel injection and computer-controlled horsepower?

I'd like to hear what you think.

Leave a comment and tell me which side you're on.

— Troy Kane

ASE Certified Master Automotive Technician | Master Collision Repair Technician

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