So, you’re looking to upgrade the performance of your 2nd-generation Chevrolet Chevelle (1968-1972). Well, great news: with design elements like a robust body and frame, standard rear-wheel drive, and potent stock engines, these models make a fantastic platform for performance modifications.
But where do you start? Your first step should be determining your performance goals, ensuring any upgrades move you closer. Do you want more power? Better handling? A more aggressive sound?
You’ll also need to ensure all mods are compatible with your car, if they require professional installation, are high quality, etc. Thankfully, this guide explores all this and more, upping the odds of a successful upgrade.
We’ll first share more points to keep in mind when mod shopping. Then, we’ll examine why these upgrades are so popular in the modding community. Finally, we’ll reveal five 2nd gen Chevelle performance mods worth considering.
Comprehensive Guide for 1968-1972 Chevelle Performance Upgrades: What to Consider When Mod Shopping
- Performance Goals: With 10 different engines, four transmissions (two automatic, two manual), and multiple performance packages, 2nd gen Chevelles come in many configurations. By considering your model’s capabilities and setting clear performance goals, you maximize your investment and move closer to your ideal build.
- Installation Difficulty: Some upgrades are fairly straightforward and can be installed over an afternoon, while others are complex and require special tools. Before making any purchases, consider whether your mechanical expertise and available tools are sufficient. Otherwise, you’ll have to factor in the cost of paying a shop.
- Compatibility: While some mods are universal, others are specific to a vehicle’s make, model, trim, and powertrain. You surely don’t want to tear your car apart only to learn the part isn’t compatible. To ensure a good experience, always check the fitment details of a mod before spending any money.
- Brand and Part Quality: The saying “a chain is only as strong as its weakest link” also pertains to mods. Opt for budget products, and you may run into reliability or fitment issues. Instead, shop established brands known for quality products with strong coverage, like Edelbrock, Magnaflow, MSD, and more.
Key Design Specs for the 1968-1972 Chevelle: An Excellent Performance Platform
- Powerful Engines: As any performance enthusiast will agree, there's no replacement for displacement. Thankfully, the 2nd gen Chevelle boasts 10 powerful engines, ranging from a 3.8L Turbo-Thrift I6 to a 7.4L Big-Block V8. Each engine is well-known for delivering reliable performance, even when upgraded past stock.
- Rear-Wheel Drive: Rear-wheel drive (RWD) is the ideal platform for most performance modders, much due to improved weight distribution, which increases stability when high-speed cornering. RWD cars like the Chevelle also tend to accelerate quicker thanks to the added traction from the rearward weight shift during takeoff.
- Robust Frame: 2nd gen Chevelles sit atop the GM A-body platform, also used in models like the Pontiac GTO, Oldsmobile Cutlass, and Chevy El Camino. The A-body is popular for its durable, high-strength steel construction, which provides a sturdy performance foundation for mods.
- Available Manual Transmission: Much like RWD, a manual transmission is often a must-have for performance enthusiasts. Compared to automatics, manuals—like the Muncie 4-speed in the 2nd gen Chevelle—generally offer more direct control over gear shifts and power output, resulting in a more engaged experience.
- Beginner-Friendly: With its straightforward mechanical design and vast array of available aftermarket parts, the 2nd gen Chevelle is an accessible starting point for newcomers. Moreover, an active online community and numerous resources offer guidance and support, making the journey from stock to modified both achievable and enjoyable for beginners.
Performance Mods for the 1968-1972 Chevelle: 5 Upgrades Worth Considering
1. Replace the Stock Exhaust
By upgrading your stock exhaust, like installing a high-flow muffler, larger pipes, and performance headers, you facilitate a smoother exit for combustion gasses and optimize backpressure.
Besides enhancing your Chevelle's exhaust note, you'll also enjoy 5-10% more power and, in some cases, better fuel economy.
Installation difficulty depends on the system, but bolt-on kits are typically pretty straightforward. Moreover, these upgrades often only require common tools like a floor jack, socket set, ratchet, and safety gear.
As for cost, expect to spend anywhere from $300 to over $1,000 on a performance exhaust system for the 2nd gen Chevelle, not including installation.
2. Supercharge the Engine
For some serious horsepower gains, consider installing a supercharger. This significant performance upgrade forces more air into the engine, resulting in a more powerful combustion explosion and, therefore, more power.
How much horsepower does a supercharger add? Expect gains of around 30-60%, depending on the product and which engine it’s going in.
For example, installing this Edelbrock supercharger kit in a 2nd gen Chevelle with the 5.7L Small-Block V8 should see horsepower jump from 300 to 507 and torque from 380 to 487.
While great for improving performance, superchargers do cost a bit more. For instance, the above kit will set you back roughly $3,500, not including installation.
3. Upgrade the Ignition and Intake Systems
2nd gen Chevelles originally came equipped with a contact points-type ignition system, which is known for being somewhat problematic.
An upgrade to an electronic ignition system enhances reliability and can provide a noticeable boost in performance and fuel economy by ensuring a consistent and strong spark, which is crucial for efficient combustion.
Additionally, optimizing the intake system—perhaps through the installation of a performance cold-air intake—can enhance airflow to the engine, improving both power output and efficiency.
Together, these upgrades not only assure more reliable and efficient engine operation but also elevate its overall performance.
4. Install a Performance Suspension
Enhancing your 2nd gen Chevelle's handling via performance suspension upgrades can improve responsiveness and stability, particularly during high-speed maneuvers.
For instance, performance shocks, struts, and sway bars can sharpen cornering, minimize body roll, and deliver a more controlled ride, especially during aggressive driving or on inconsistent terrains.
While installing suspension upgrades isn't too complex, it can be challenging for those with limited mechanical expertise and lacking specific tools, such as a master ball joint separator or a tie rod adjuster.
Financially, be ready to drop $400 to over $3,000, depending on the mod. Shock absorbers and lowering springs are more budget-friendly options while upgrading to a full coilover kit or electronically adjustable system will be costlier.
5. Opt for Performance Brakes
While mods can significantly boost your 2nd gen Chevelle's performance, the added power means little if you can't efficiently slow or stop your car.
By upgrading your stock brakes with mods like performance pads, vented and slotted rotors, or multi-piston calipers, you'll not only improve stopping power but also heat dissipation.
Another option, specifically for Chevelles equipped with drum brakes, is a disc conversion kit. This product will provide a substantial improvement in stopping power and also minimize brake fade during prolonged use.
Installing new pads, calipers, and rotors isn't too difficult. Most Chevelle owners can easily DIY upgrade the project, provided the parts include detailed instructions.
As for pricing, $700 to $2,500 is the typical range, depending on the upgrade.
JEGS: For All Your Automotive Needs
If you made it this far, you should be fully prepared to jump right in and start modding your 2nd gen Chevelle with confidence.
For a massive selection of high-quality upgrades, consider JEGS, a leading supplier of performance auto parts. Just filter your search via your Chevelle’s year and model, and have your order sent straight to your door.
Still have questions? Contact our team today.
