The Details
'69 Mustang Boss 302
Owners: Harrell and Tammy Downey, Pace, FL
Meet 347 ci of blown Boss 302 yielding 550 hp around 7,000 rpm. We admire the way previous owner Matt Grill mated form and function, supercharging the Boss with Paxton huffage. Splined into a Tremec five-speed box, this is a Boss mill ready to go anywhere. | 
The Downey's Boss is primarily stock on the inside, with the standard black Comfortweave knitted-vinyl, high-back seats, optional Sport Deck fold-down rear seat, and a billet steering wheel to match the Boyd 18s at all four corners. | 
Ford's classic Boss 302 was born for wheels like these-huge 18-inch world-beaters designed for handling and pure brawn. |
Engine
Boss 302-4V V-8
347ci stroker
Boss 302 block and heads
Ported and polished heads
Custom-forged pistons, 9.0:1 compression
Steel crank
Forged I-beam rods
Balanced and blueprinted by L&R Automotive in Sante Fe Springs, California
Paxton NOVI 1200 supercharger
Barry Grant 750-cfm Mighty Demon
Port-matched Boss 302 manifold
Custom-grind mechanical 0.540/0.560-inch lift, 272/282
duration camshaft
Roller rockers
MSD ignition system
Transmission
Tremec World Class T-5 five-speed
Rearend
Currie Enterprises 9-inch
4.11 gears
31-spline axles
Exhaust
FPA headers
311/42-inch Dr. Gas dual exhaust system
Suspension
Front: Stock coil on upper arm, lowering springs
Rear: Five-leaf and 111/42 inches lower
Brakes
Front: Baer disc
Rear: Baer disc
Wheels
Front: Boyd Coddington
Smoothie II, 18x9-inch
Rear: Boyd Coddington
Smoothie II, 18x10-inch
Short-lived Ford stylist Larry Shinoda, father of the Corvette Sting Ray and the Boss 302, knew what he was doing when Ford boss Bunkie Knudsen put him on Mustang and gave him carte blanche. His approach was simple and clean, making the most of Ford's SportsRoof Mustang body.
Tires
Front: Toyo Proxes, P255/35ZR18
Rear: Toyo Proxes, P285/35ZR18
Interior
Completely stock Boss 302 standard Comfortweave interior, custom steering wheel designed to match the Coddington Smoothie II wheels, custom Hurst shifter handle
Exterior
Stock Boss 302 graphics, Wimbledon White paint
Harrell and Tammy Downey's Corral o' Cars
'69 Boss 429
'68 GT 428CJ
'69 Mach 1 428CJ
'70 Boss 302