Also from Wednesday's car-spotting session was this Cascade Green 1964½ Ford Mustang convertible. Officially, according to Ford and the VIN plate, it's a 1965 model, but the first Mustangs built from the spring of '64 until the actual start of Ford's 1965 model year later that fall are known by fans as "1964½" cars.
By building a sportily-styled 2+2 coupe with front bucket seats and a console-mounted shifter on the basic underpinnings of their compact Falcon sedan, Ford created a whole new class of automobile for the American market: the "Pony Car". It sold like gangbusters and was immediately* joined by the Plymouth Valiant-based Barracuda and, later, the Chevy Camaro, which shared the front subframe of the Nova compact.
The fender badges say it has a 289 V-8. Prior to the official start of the 1965 model year, there was no 2-barrel version of the 289 offered in the Mustang, with the cheap V-8 role being filled by the 2bbl 260cid Fairlane V-8. The 289 would be one of two 4bbl variants, either the 210bhp 9.0:1 compression version, or the hi-power "K-code" motor, which was considerably beefier, with an output of 271 SAE gross horsepower.
From a period Car and Driver road test:
"Crankshaft design for this engine became the subject of a special study. The crank is made of precision-cast alloy iron and runs in five main bearings. About 70%of the total unbalanced couple is balanced by counter-weights on the crankpin webs, and the remaining 30% is balanced by two external counterweights—one mounted in front of the timing sprocket and the other integrally with the flywheel. In most previous passenger car applications of this engine, the fourth harmonic unbalance occurs beyond the normal speed range. But on the high-performance 289 the fourth harmonic comes within its 7000-rpm range, so the vibration damper developed for the Indianapolis engine, with enlarged rubber contact areas and tuned for higher crankshaft speeds, was adapted. The high-performance 289 also has the cross-bolted crankcase from the Indy engine, plus a number of special design features such as high-tensile strength connecting rods, copper-lead alloy bearing shells, chrome-plated valve stems, mechanical valve lifters, and a high-lift, high-overlap camshaft. The cylinder heads give a compression ratio of 10.5-to-one, and the air intake system consists of a low-restriction air cleaner, an opera-throat four-barrel carburetor, and direct manifold passages. The exhaust system boasts individual headers merging into twin tail pipes. Power output is an impressive 271 bhp at 6000 rpm with a maximum torque of 312 lbs-ft at 3400 rpm.Naturally this unit can be tuned still further for racing purposes by such patent medicines as Dr. Shelby's Cobra Elixir (or imitations available from your local Performance Drugstore). Over 300 bhp may be reached without impairing engine reliability. Specific output of the hottest production model Mustang engine is 0.95 bhp per cu in, as against 0.73 for the standard 289-cubic-inch power unit."
*...and when I say "immediately", I mean immediately. Mopar fans will gleefully point out that the Barracuda was actually the first Pony Car to go on sale, having beat the Ford to showrooms by almost two weeks. The Mustang program was a poorly-kept secret around Detroit, and the rush program to put a glass fastback and bucket seats in a Valiant got iron on the streets before Dearborn did.
