Maintaining your '67 Mustang's engine means making sure it's staying clean. Replacing your air cleaner and fuel filter routinely will help you to avoid a lot of issues. You'll also want to routinely check your gaskets, spark plugs, and other wear-items.

There are also ways you can improve horsepower. By adding a more powerful carburetor or a better intake manifold you can improve your engine's efficiency. A little extra power can make a big difference on your daily drive.

If you have track day aspirations for your classic Mustang, then you may want to get more serious about upgrades. With a crate engine, you can insert modern performance into your first-gen. Or, build up your own engine with high-quality cylinder heads, camshafts, and other valvetrain components.

Considering how essential your Mustang's engine is to your enjoyment, it makes sense to invest a significant portion of your time to make sure it's everything you want it to be.

Not the year you're looking for? Check out these years: 1964, 1965, 1966, 1968, 1969, 1970, 1971, 1972, or 1973 for additional options.