Regarding parts interchangeability, the short answer is “some parts are, but key components are not.”

• Non-Interchangeable Parts: The primary differences are in the front-end sheet metal. The hood, front fenders, grille, and radiator core support from a 1973-1980 model are not compatible with a 1981-1987 model, and vice versa. It is essential to order these parts according to your truck’s specific model year.
• Generally Interchangeable Parts: The cab shell itself (from the firewall back), doors, bed, and most major chassis components have a high degree of interchangeability across the entire 1973-1987 range. However, smaller mechanical and electrical parts, such as brake lines or wiring harnesses, can vary by year and configuration.

We suggest that buyers should always confirm the exact year of your vehicle before purchasing classic gm square body parts. If you’re ever unsure, contact our technical experts. We’ll help you accurately identify your truck and find the perfect-fitting 73-87 chevy truck parts.

The following projects are widely considered to offer the best “bang for your buck” and are ideal for beginners:

Step 1: Deep Clean & Assessment
This may sound simple, but it is the most important first step. A thorough cleaning of the interior, exterior, and undercarriage will give you a complete picture of the 73-87 Chevy truck’s condition, reveal hidden issues, and prepare you for the work ahead.

Step 2: Interior Refresh
The interior is where you interact most with your vehicle, and improvements here provide the most immediate sense of satisfaction.

You can try a new carpet kit, putting on a set of seat covers, or adding a new dashboard cap. These projects typically require basic hand tools and provide a dramatic visual transformation, making a tired cabin look fresh again.

Step 3: Basic Tune-Up & Maintenance
Getting the truck running healthy is core to the experience.

We suggest replacing the spark plugs, distributor cap, ignition coil, and plug wires. Change the oil, coolant, and all filters. This basic maintenance not only improves the engine’s reliability and efficiency but also helps you become familiar with the engine bay.

Step 4: Lighting & Exterior Detail Upgrades

Upgrading the dim factory headlights to modern LED headlights dramatically improves nighttime visibility and safety while giving the 1973-1987 square body Chevy a sharper look. Additionally, replacing faded or cracked taillight lenses, side markers, and installing new chrome trim or a new bumper are relatively simple projects that significantly enhance the truck’s exterior appearance.

The dream place to store it is a climate-controlled, dry garage. Otherwise, indoor storage in a garage or a barn will be preferable to protect it against the sun, moisture, and temperature changes that catalyze rusting and interior corrosion. Indoors, cover your 73-87 Chevy trucks with a quality but breathable cover and a clean vehicle–not a plastic cover, which will trap moisture.

In case of long-term storage (e.g., over winter), these are the important steps to follow. Make sure that the tank is filled up to 90 percent and that there is an addition of a stabilizer. Replace the oil and filter to eliminate rust-causing pollutants. To avoid getting flat spots in tires, overinflate the tires to 10 PSI or better yet, use jack stands. Keep the battery on a trickle charger or leave the negative cable off. Lastly, in and on the 70s square body Chevy, apply mothballs or rodent repellents to avoid the chewing by pests and nest-making by these critters. These steps will help keep your old school square body Chevy safe and road-ready.