'1967' 440/375 HP and 440/350 HP Comparison

The 1967 Big Ole' "440"

'1967' ~ 440/375 HP

Found in the > Plymouth GTX, Dodge Coronet R/T and Dodge Charger R/T

* 375 Horsepower @ 4600 RPM's
* 480 Ft/Lbs. of Torque @ 3200 RPMs.

Compression Ratio ....... 10.1-1 {Flat Top Pistons}

Engine Internals
* Forged Steel Crankshaft
* Drop Forged Steel Connecting-Rods
* Cast Pistons
* Pressed-Fit Pins {High Manganese Steel}
* Dynamic Balanced
* Top Piston Ring {Cast Iron} Radius-Faced
* 2nd Ring {Cast Iron} 'Tin-Coated Edge' {Gap .013 to .022"}
* Oil Expansion Ring {Stainless-Steel}
* Bi-Metal Bearings {Main and Connecting-Rods}
* Main Bearings {Oil-Grooved Upper-Half Shell}
* Oil Pan Windage Tray
* High Pressure Oil Pump {45 to 65 lbs.} @ 2000 RPM's
* Camshaft Gear {Nylon-coated Aluminum}


Cylinder Heads ....... #2780915
Intake Valve ............... 2.08"
Exhaust Valve ............. 1.74" > {Low-Friction Valve Locks}
Combustion Chamber ... 'Closed'
CC's ........................... 78.5 {Factory} ~ 73.5 {Minimum}

Camshaft "Hydraulic'
Lift ......... .450"/.458"
Duration .. 268*/284*
Overlap .... 46*

Valve Springs 'Single-Coil' w/Surge Damper
Load-Rate ...... #129 lbs. @ 1.86"
Load-Rate ...... #258 lbs. @ 1.40"

Intake Manifold ...... #2807618 > Cast-Iron Dual-Plane Medium-Rise

Carburetor
Carter AFB {750 CFM} 'Mechanical Secondaries'
#4326S {M/T} ........ Primary Jets = .098" ~ Secondary Jets = {L}.080"/{R}.065"
#4327S {A/T} ........ Primary Jets = .098" ~ Secondary Jets = {L}.077"/{R}.065"
Primary ............ 1 11/16" {1.686"} ~ Venturi = 1.437"
Secondary ........ 1 11/16" {1.686"} ~ Venturi = 1.563"
Metering-Rods .... '3-Stage' Step-up Rods

Fuel Pump
High Pressure .. 3.5 to 5.0 lbs.

Air Cleaner
'Twin-Snorkel Scoop'

Exhaust Manifolds
Style > Swept-Design 'low-restriction'
Profile > Medium-Length Header type
Header Outlet Size > 2.38"
Driver-Side ....... #2806900
Passenger-Side .. #2806974

Exhaust Pipe Size
* Primary ....... 2 1/2" {2.50"}
* Tail Pipe ...... 2 1/4" {2.25"}

Exhaust System
* Dual
* Muffler 'Reverse-Flow'
* 'H-Pipe' Balance Cross-Over

Electrical and Ignition
* 70-Amp Battery
* 37-Amp Alternator
* High-Torque Starter
* Dual-Breaker Distributor
* Ventilated Distributor-Points

Tire Sizes
7.75 x 14"

Engine Names
* Plymouth GTX > 'Super Commando 440'
* Dodge Coronet R/T > '440 High Performance'
* Dodge Charger R/T > '440 Magnum'