1971 Match Race ~ 'Duster 340' vs. 'Boss 351 Mustang'

Specifications

1971 'Duster 340'......................................................................1971 Mustang 'Boss 351'

Shipping Weight.......... #3165 lbs............................................. #3281 lbs.
Curb Weight................ #3340 lbs............................................. #3430 lbs.

340__________________________________________-____351
Bore..........4.04"....................................................................... 4.00"
Stroke...... 3.31"....................................................................... 3.50"

275 HP 'Factory Rated'............................................................. 330 HP 'Factory Rated'

275 HP @ 5000 RPM's.............................................................. 330 HP @ 5400 RPM's
340 Ft/Lbs. of Torque @ 3200 RPM's....................................... 370 Ft/Lbs. of Torque @ 4000 RPM's

Red Line................ 5850 RPM's............................................... 6150 RPM's

{ 310 HP 'NHRA' Rated }......................................................... { 330 HP 'NHRA' Rated }

1971 NHRA Class... G/S or SS/I............................................... F/S or SS/I

Compression........ 10.3 to 1..................................................... 11.3 to 1
Piston................... Flat-Top w/2 Notches................................ .315" Dome
Type..................... Forged Aluminum....................................... Forged Aluminum
Piston Height....... +.045 'Above Deck'..................................... -.008" 'Below Deck'

Crankshaft.......... Forged Steel................................................. Cast High-Strength Nodular
Rods................... Forged.......................................................... Forged ~ Shot-Peened and Magna-fluxed
Piston Pins......... Full-Floating.................................................. Pressed-Fit
Rod Bolts............ 3/8".............................................................. 3/8" ~ Special Length and Hardened

Cylinder Head...... #3418915 'J' Head...................................... D1ZE-B
CC Chamber......... 71 to 73 {Factory}...................................... 67.6 {Factory}
CC Minimum........ 63.3 CC {NHRA}.......................................... 64.6 CC {NHRA}
Intake................. 2.02"............................................................ 2.19"
Exhaust............... 1.60"............................................................ 1.71"
Intake Volume.... 149 CC.......................................................... 244 CC
Exhaust Volume.. 69 CC............................................................ 136 CC

Camshaft............ 'Hydraulic'..................................................... 'Mechanical'
Lift...................... .463"/.472" {NHRA specifications}.............. .491" / .491" {NHRA Specifications}
Duration.............. 276*/284*................................................... 290* / 290*
Overlap............... 52*............................................................... 58*

Valve Springs...... #134 lbs. 'Closed'......................................... #93 lbs. 'Closed'
Valve Springs.......#235 lbs. 'Open'........................................... #315 lbs. 'Open'

Rocker Arms........ Stamped-Steel Non-Adjustable.................... Stamped Steel 'High-Strength' Adjustable

Intake................. Cast Iron 360* Dual-Plane High-Rise........... Cast Aluminum Dual-Plane High Rise

Carburetor.......... Carter Thermo-Quad {800 CFM}.................... Autolite #4300-D {750 CFM}
Throttle Bore...... 1.375" Primary ~ 2.250" Secondary............... 1.563" Primary ~ 1.690" Secondary

Distributor......... Dual-Point....................................................... Dual-Point

Air Cleaner........ Unsilenced....................................................... Ram-Air Induction w/Twin 'NASA' Hood Ducts

Exhaust Pipe...... 2.25"

Transmission..... 2.44 / 1.77 / 1.34 / 1.00 {A-833}.................. 2.32 / 1.69 / 1.29 / 1.00 {Close-Ratio}

Clutch................ 10.5".............................................................. 11.0"
Spring-Load.............................................................................. #1845 lbs.

Flywheel................................................................................... 27.3 lbs.

Shifter............... Hurst Linkage.................................................. Hurst Shifter

Gears................ 3.91 'Sure-Grip' {Optional}.............................. 3.91 'Traction-Loc'

Rims................. 14" x 5.5"......................................................... 15" x 7"

Tires................. E-70 x 14" Goodyear Polyglas GT...................... E-60 x 15" Goodyear Polyglas GT