This little yellow coupe is...
This little yellow coupe is a '66 and it shows what can be done starting with a six-cylinder car as a basis. This mildly modified Mustang has a hopped up engine, five-lug wheels, and all the external details looking good. The K-style "high performance" emblem highlights the number 200. The upside to the six-cylinder cars is inexpensive initial cost and economical operation. Parts availability for the inline engine is not nearly as great as for the 289, but there are a small group of die-hard parts companies still supporting them. We think the vinyl top is always a good-looking option on this body style.
If you're dreaming up your next classic Ford project then you've probably gone over a huge range of possibilities in your head. If you've settled on a Mustang for your next undertaking, then deciding which year and model to work on might seem like an easy choice, but is it? The natural inclination would be to build your all-time favorite model, but if your favorite is a '69 Boss 302 (thanks, rub it in Wayne!-Ed.) then initial cost and parts availability can quickly factor into your considerations. If you can afford a genuine Boss Mustang then there is no problem, but if you're like many of us, the cost of these cars has gone out of reach, and so the search is on for something more affordable. What should you buy and build when budget limitations are present? The most common classic Mustang is the '65-'68 coupe. Ford built more of these than any other type. Coupes are a good way to enter the hobby because they are the most numerous and hence cost the least.
The ante for a fastback or convertible has gotten to the point where double is the norm. A '65 coupe that brings $7,500 might cost $15,000 if it were a fastback version in similar condition. But both cars would take about the same amount of cost and effort to restore. Spending the same amount of refurbishment money you'd have a far more valuable vehicle on the finished end if you start with a fastback or convertible. This isn't to say that coupes aren't great cars-they are; and a coupe is a great way to break into the classic Mustang hobby. However, nowadays it's easy to spend more on the restoration than you did on the original car, so if you're going to spend 20k on a Mustang project you need to examine the value of the end result. Let's look at some perennial favorites for modification and evaluate them by year, model, and for parts availability. The truth is that it's possible to make nice modifications to almost any sort of Mustang. After all, love is a subjective thing. Let's have a look at some of the more interesting examples we've run across in all of the classic Mustang categories.
Coupes Are Cool
At the extreme...
Coupes Are Cool
At the extreme end of the first generation coupe modification is this competition orange metallic example. It's complete with shaved details, huge wheels and a supercharged engine. It's just another example of why first generation Mustang coupes are so popular.
Coupes Are Cool
To come down with both feet on the subject of best Mustang modification candidates our first choice would go to the '65-'68 coupe models. They rank first because of bang for the buck status. The coupe does everything on the ground just as well as a fastback or convertible. Any performance or handling modification will shine just as brightly on a coupe as on any other model. Even six-cylinder cars are in the performance and modification game with new engine and other performance parts available. For serious performance you'll want to start with a V-8-equipped car. While a V-8 conversion of six-cylinder cars is possible, it is an involved process and you're better off starting out with the nicest basis for a project that you can afford. Parts and labor have gotten a lot more expensive in the last 10 years and you're ahead if you begin with a car that is as straight and rust-free as possible.
Fastback Fascination
Here's...
Fastback Fascination
Here's a '66 Mustang in the form of a Shelby G.T. 350. Carroll Shelby had great styling instincts and we show you this car because any styling cue or mechanical modification you'd like to borrow from it would be a good idea and universally considered to be in good taste.
Fastback Fascination
Just about any fastback Mustang from '65 to '70 is considered to be a good investment. Their extraordinary styling has put them on par from a value standpoint that has surpassed many other classic performance cars from the period. Fastback values seem to have out stripped other classic car benchmarks, and few makes and models have kept pace with fastbacks and SportsRoof Mustangs.

This Emberglow '66 GT coupe...

This Emberglow '66 GT coupe may not look too modified, but the car is complete with reworked suspension, 15-inch Magnum 500 wheels, and a souped up drivetrain including an overdrive transmission. The owner ran this car in the 100mph class at the Nevada Silver State Classic.

Modified doesn't stop with...

Modified doesn't stop with the body and powertrain. Your imagination is the limit, but on this beautiful blue coupe the completely redone custom interior is the epitome of good taste. The only things stock in this tasteful customization are the window cranks and the glovebox door.

Here's an early coupe taken...

Here's an early coupe taken another step up. This car started life as a C-code 289-equipped grocery getter. Its V-8 status made it not too much of a stretch to install a Windsor-based 408. Now the car has some serious power and has the Tremec transmission and 9-inch axle to go along with it. The car also includes all the modifications required to support the extra horsepower, such as an oversized radiator and engine oil cooler.

Stepping up to the next year...

Stepping up to the next year body style we can see that '67-'68 coupes also take to mod-ifications very well. On this mildly modified car the Cragar SS five-spoke wheels and K-style air cleaner are the only visible changes.

Here's another orange coupe...

Here's another orange coupe that takes the modified theme a little further. On this car the flamboyant paintjob is complimented by emblem delete, GT foglights mounted in the grille, and 17x8 custom wheels.

If you choose this cream puff...

If you choose this cream puff as your restoration project you'll be in for the full monte. About the only thing this car has going for it is the fact that it's a fastback. The upside to this car is that it would take about the same amount of effort to restore as a basket case coupe and when you're finished you'll have a much more valuable car.