In order to compete in NASCAR with Chrysler Corporation’s Hemi, a new motor was needed. The redesigned  and most successful 429 CID canted valve – almost hemispherical head – Boss 429 was the result. For unknown reasons, it was only available in the Mustang, a car not raced in these events!  See the Brochure HERE.

The new 351 CID V-8 resulted from a stroke increase from 3.00″ to 3.50″, requiring adding 1.275″ to the block’s deck height so that a crank with this greater stroke could be used. The block was strengthened with heavier cylinder walls and bulkheads around the mains and the crankshaft main and rod bearings were increased to 3.0o” and 2.2486″ respectively. See The AMA Specifications Sheet on this engine HERE.

Model 63 A – The new Mustang Sportsroof fastback now came with a rear deck spoiler, ventless side glass, new grille and quad headlamps. Interior featured foam-padded bucket seats with soft vinyl trim, sport steering wheel, fully synchronized 3-speed transmission with floor-mounted shift, color­-keyed carpeting throughout. There were five engine choices ranging from a 115 hp 200 CID six to a 335 hp 428 CID V-8. Available options included the Select-Shift Cruise-O-Matic.

Model 76A – The Mustang Convertible came with a 5-ply vinyl folding top that is manually stowed, with the automatic power top as an option. A clear vinyl backlite is standard, with a glass backlite available. A floor-mounted shift lever on all transmissions, and a choice of eight engines. Bucket seats were individually adjustable. Interior featured foam-padded bucket seats with soft vinyl trim, sport steering wheel, fully synchronized 3-speed transmission with floor-mounted shift, color­-keyed carpeting throughout.

There were five engine choices ranging from a 115 hp 200 CID six to a 335 hp 428 CID V-8. Available options included the Select-Shift Cruise-O-Matic.

Model 65E – The Mustang Grande interior was upscale and more luxurious than the standard coupe. Special bucket seats were trimmed in vinyl and hop sack cloth. Door panels had built-in courtesy lights, and were trimmed in vinyl, accented with unique teak-toned appliques. A sport deluxe faux wood 3-spoke Rim-Blow steering wheel and instrument panel with wood-toned highlights were part of the package. An electric clock was standard. Special Grande insulation was also exclusive.

There were five engine choices ranging from a 115 hp 200 CID six to a 335 hp 428 CID V-8. Available options included the Select-Shift Cruise-O-Matic.

Model 63D – The Mach 1 Sportsroof had five V-8s available with a 351 CID 2-barrel standard, then a 351 CID with 4-barrel carb then the 390 CID 320 HP and the 428 Cora Jet with either Ram Air or not. It came with dual exhausts with the 351 4-bbl or both 428’s.

The interior had foam-padded, vinyl-trimmed high back bucket seats, a faux wood 3-spoke Rim-Blow steering wheel, and clock. console, teak-toned highlights on the dash, door panels and console, bright floor pedal pads The exterior featured Racing mirrors, left and right, low-gloss paint on the hood and cowl, and pin-type hood lock latches, and reflective stripes.

Standard transmission with both of the 351 CID V-8s was the fully synchronized 3-speed manual. The 4-speed or Select-Shift Cruise-O-Matic was optional, and the 3-speed manual transmission was not available on the 390 and 428.

Model 63 –  The Boss 502 model’s exterior features include a non-glare racing black hood. rear deck and back panel plus a “C” stripe on the side combined with a choice of Bright Yellow, Calypso Coral, Wimbledon White, or Acapulco Blue paint. The simulated air scoops found on other Mustang Sportsroof models were eliminated on the Boss 302.

Interior features included carpeting and high-­backed bucket seats, trimmed in luxurious Comfort ­weave knitted vinyl. An interior decor group was available at extra cost with a simulated teak wood-grained instrument panel and optional console trim.

Equipment list included: 5-litre 302 CID 290 HP engine with cast aluminum rocker covers, special high-rise intake manifold, Holley 780 CFM 4-barrel carburetor, dual-point ignition, high-capacity clutch, 4-Speed manual transmission, “Daytona” axle with a standard 3.50:1 ratio, “Magnum 500″ styled steel wheels with 7.00” rims, F60 x 15 Fiberglass belted tires with white letters, quick ratio steering, power brakes with floating caliper front discs, competition handling springs, staggered shock absorbers and a front stabilizer bar, electronic engine RPM limiter, front spoiler, collapsible spare tire.

Model 63 – The Boss 429 includes a functional front spoiler to provide even better traction in handling A massive functional hood scoop and spoiler and a slight modification to the fender wheel lips to accommodate the extra inch of tread and the F 60 x 15 tires. Exterior Colors available are Raven Black, Royal Maroon, Candy apple Red, Wimbledon White, Blue and Black Jade.

The carpeted all-black interior, quieted by the special Mach I sound insulation package, features Ford’s “Comfort weave” knitted vinyl on high-back bucket seats. Standard equipment: 429 CID, 375 horsepower Cobra Jet HO V-8 engine with a driver-controlled  ram air intake, Hemi cylinder heads, full­ flow exhaust manifolds, unique high rise intake manifold, cast aluminum rocker covers, a forged steel crankshaft and a Holley 735-cfm 4-barrel carburetor, high-capacity engine oil cooler.

Included was a 65-Ampere alternator, 85-Ampere hour trunk-mounted battery, power steering with special power steering oil cooler, 4-Speed close-ratio manual transmission, power front disc brakes, 3.91:1 Rear axle with “Traction-Lok” differential, special suspension system with ultra-heavy-duty performance front and rear springs and shock absorbers, extra-heavy-duty competition front and rear stabilizer bars, and a staggered rear shock absorbers, front spoiler, F60 x 15 Wide-oval fiberglass belted tires with raised white letters, chrome-plated 15 x 7 “Magnum 500” steel wheels.

Inside was a Tachometer, Interior decor group, console, high-back bucket seats with “Comfort weave” knitted-vinyl trim, Dual racing mirrors, Visibility group, Deluxe seat belts, Long-wearing nylon carpeting.

GT Equipment Group (Mustang GT) Available on Hardtop, Convertible or Sportsroof. Choice of 250 or 290 HP 351 CID or 390 CID or 428 CID V-8. Dual exhausts with quad outlets with 290 HP 351 or 390 or 428 V-8 engines, wide­ oval belted tires on real competition-type styled steel wheels. Heavy duty shock absorbers, springs and stabilizer bars. Also pop-open gas cap, pin-type hood lock latches, Special Gt stripes and functional hood air scoop with the 4V 428 Cobra Jet Ram-Air (simulated scoop with the other engines). Plus GT ornamentation.

250 CID I-6.  Overhead valves. Cast iron block. Seven main bearings.
Displacement: 250 CID.
Bore and stroke: 3,62″ x 3.19″.
Compression ratio: 9.0:1.
Horsepower: 155 @ 4000 RPM.
Torque: 240 @ 1600 RPM.
Valve lifters: Hydraulic.
Camshaft Timing: Intake: 252 degrees, Exhaust: 254 degrees, Lift: (Intake) 0.368″,  (Exhaust) 0.368″. Overlap: 27 degrees.
Carburetor: Emission Control Ford Autolite one-­barrel (Manual Transmission) C9OF-9510-B (Automatic Transmission) Model C9OF-9510-A. Carburetor with Air Conditioning: Ford Autolite one-­barrel (Manual Transmission) C9OF-9510-J (Automatic Transmission) Model C9OF-9510-K.

NOTE: Not available on Mach 1 or Boss models.

302 CID 2-Barrel V-8. (Code “C”) Overhead valves. Cast iron block. Five main bearings.
Displacement: 302 cubic inches.
Bore and stroke: 4.00 x 3.00 inches.
Compression ratio: 9.5:1.
Horsepower: 220 @ 4600 RPM.
Torque: 300 @ 2600 RPM
Valve lifters: Hydraulic
Camshaft Timing: Intake: 266°, Exhaust: 244°, Overlap 34°, Lift: (Intake) 0.368″, (Exhaust) 0.380″.
Carburetor:  (Manual Transmission) Ford Autolite 2-barrel Model C8AF-9510-BD; (Auto Transmission) Ford Autolite 2-barrel Model C9AF-9510-A.

NOTE: Not available on Mach 1 or Boss models.

351 CID 2-Barrel V-8. Engine Code “X” Overhead valves. Cast iron block. Five main bearings.
Displacement: 351 cubic inches.
Bore and stroke: 4.00 x 3.50 inches.
Compression ratio: 9.5:1.
Horsepower: 250 @ 4600 RPM.
Torque: 355 @ 2600 RPM.
Valve lifters: Hydraulic
Camshaft Timing: Intake: 256°, Exhaust: 270°, Overlap 33°, Lift: (Intake) 0.418″ (exhaust) 0.448″.
Carburetor: Ford Autolite 2-barrel Model (manual transmission) C9ZF-9510A  (Automatic transmission) C9ZF-9510B.

NOTE: Not available on Boss models.

290 HP 302 CID V-8. (Code “G”) Overhead valves. Cast iron block. Five main bearings.
Displacement: 302 cubic inches.
Bore and stroke: 4.00 x 3.00 inches.
Compression ratio: 10.5:1.
Horsepower: 290 @ 5800 RPM.
Torque: 290 @ 4300 RPM.
Valve lifters: Mechanical.
Camshaft Timing: Intake: 290°, Exhaust: 290° degrees, Overlap 58° Lift: (Intake) 0.501″ @ .020″ lash (Exhaust) 0.501″ @ .020″ lash.
Carburetor:  (Manual Transmission only) Ford Holley 4-barrel Model C9ZF- 9510-J.

NOTE: Only available on Boss 302 model.

351 CID 4- Barrel V-8. Engine Code “M” Overhead valves. Cast iron block. Five main bearings.
Displacement: 351 cubic inches.
Bore and stroke: 4.00 3.50 inches.
Compression ratio: 10.7:1.
Horsepower: 290 @ 4800 RPM.
Torque: 385 3200 RPM.
Valve lifters: Hydraulic.
Camshaft Timing: Intake: 256°, Exhaust: 270°, Overlap 33°, Lift: (Intake) 0.418″ (exhaust) 0.448″.
Carburetor:  Ford Autolite 4-barrel Model (Manual transmission) C9ZF-9510C,  (Automatic transmission) C9ZF-9510D.

NOTE: Not available on Boss models.

390 CID 4-Barrel V-8. Engine Code “S” Overhead valves. Cast iron block. Five main bearings.
Displacement: 390 cubic inches.
Bore and stroke: 4.05 x 3.78 inches.
Compression ratio: 10.5:1.
Horsepower: 320 @ 4600 RPM.
Torque: 427 @ 3200 RPM.
Valve lifters: Hydraulic.
Camshaft Timing: Intake: 256°, Exhaust: 256°, Overlap 37°, Lift: (intake) 0.438″ (exhaust) 0.438″.
Carburetor: Ford Autolite 4-barrel Model (manual transmission) C9ZF-9510E, (Automatic transmission) Model  C9ZF-9510F.

NOTE: Not available on Boss models.

428 CID Cobra Jet V-8. Engine Code “P” Overhead valves. Cast iron block. Five main bearings.
Displacement: 428 cubic inches.
Bore and stroke: 4.13 x 3.98 inches.
Compression ratio: 10.6:1.
Horsepower: 335 @ 5400 RPM.
Torque: 440 @ 3400 RPM.
Valve lifters: Hydraulic.
Camshaft Duration: Intake: 270°, Exhaust: 290°, Overlap 46°, Lift: (intake) 0.481″ (exhaust) 0.481″.
Carburetor: Ford Holley 4-barrel Model (Manual transmission) C9AF-9510M, (Automatic transmission) Holley 4-barrel Model  C9AF-9510N.

NOTE 1: Not available on Boss models.
NOTE 2: This engine could be ordered with functional or non-functional ram air.
NOTE 3: The Super Cobra Jet was equipped with oil cooler, special “LeMans” Connecting Rods, modified crankshaft, flywheel and front damper and oil cooler. Additionally, Drag Pack cars received either 3.90:1 or 4.30:1 rear axle and Traction-Lok.

429 CID Boss 429 V-8. Engine Code “Z” Overhead valves. Cast iron block. Five main bearings.
Displacement: 429 cubic inches.
Bore and stroke: 4.36 x 3.959 inches.
Compression ratio: 11.30:1.
Horsepower: 375 @ 5600 RPM.
Torque: 450 @ 3400 RPM.
Valve lifters: Mechanical.
Camshaft Timing: Intake: 3291°, Exhaust: 291°, Overlap 63°, Lift: (intake) 0.496″ (exhaust) 0.515″.
Carburetor: Ford Holley 4-barrel Model (Manual transmission only) C9AF-9510S.

NOTE: Only available on Boss 429 model.