Engine Summary
- Manufacturer
- Ford Motor Company
- Family
- Ford inline-six, small-block, and FE
- Displacement
- 390 cubic inches
Also Known As
200-1V200-1V six302-2V302-4V390-2Vregular 390-4Vregular-MX 390-4V
Engine profile
1968 Mercury Montego MX engine range
Ford inline-six, small-block, and FE · 390 cubic inches · Ford Motor Company
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
200 and 302 carburetors by transmission and emissions calibration
- Value
- The factory AMA lists distinct Autolite engineering numbers for manual versus automatic and non-emission versus exhaust-emission 200-1V, 302-2V, and 302-4V applications
- Application
- Use the dated factory table and the individual car's transmission/emissions evidence; do not treat one listed carburetor as universal
- Type
- carburetor / engineering number
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
390 carburetors by transmission and emissions calibration
- Value
- The factory AMA lists distinct Autolite 2V and Holley 4V engineering numbers for manual versus automatic and non-emission versus exhaust-emission 390 applications
- Application
- Regular Montego MX 390-2V/4V; exact engineering number requires transmission, emissions, date, and individual-car evidence
- Type
- carburetor / engineering number
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
200 one-barrel six
- Value
- 200 cu in inline-six, 115 gross hp at 3,800 rpm and 190 lb-ft at 2,200 rpm
- Application
- MX sedan, hardtop, convertible, or wagon; body and transmission limits apply
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego MX
200 six factory architecture
- Value
- OHV inline-six; 3.68 x 3.13-inch bore and stroke; 8.8:1 compression; cast-iron block and head; 115 gross hp at 3,800 rpm and 190 lb-ft at 2,200 rpm
- Application
- Regular Montego MX factory power-team applications; regular or premium fuel
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
302 four-barrel V8
- Value
- 302 cu in V8, 230 gross hp at 4,800 rpm and 310 lb-ft at 2,800 rpm
- Application
- Regular MX applications shown in the factory power-team table
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego MX
302 two-barrel V8
- Value
- 302 cu in V8, 210 gross hp at 4,600 rpm and 300 lb-ft at 2,600 rpm
- Application
- Optional regular MX; base engine for MX Brougham
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego MX
302 V8 factory architecture
- Value
- 90-degree OHV V8; 4.00 x 3.00-inch bore and stroke; 9.0:1 compression for 302-2V and 10.0:1 for 302-4V; cast-iron block and heads
- Application
- Regular Montego MX and MX Brougham factory power-team applications; 210-hp 2V or 230-hp 4V
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
390 four-barrel V8
- Value
- 390 cu in FE V8, 325 gross hp at 4,800 rpm and 427 lb-ft at 3,200 rpm
- Application
- Regular MX sedan, hardtop, and convertible; separate from the 335-hp Cyclone GT calibration
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego MX
390 two-barrel V8
- Value
- 390 cu in FE V8, 265 gross hp at 4,400 rpm and 390 lb-ft at 2,600 rpm
- Application
- MX sedan, hardtop, convertible, and wagon applications shown by the factory
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego MX
390 V8 factory architecture
- Value
- 90-degree OHV V8; 4.05 x 3.78-inch bore and stroke; 9.5:1 compression for 390-2V and 10.5:1 for regular-MX 390-4V; cast-iron block and heads
- Application
- Verified regular Montego MX factory power-team applications; 265-hp 2V or 325-hp 4V
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
Advertised 427 conflict
- Value
- The early factory sheet lists a 427 hardtop path except Brougham, while later reference research reports no production installations
- Application
- Not represented as a verified production MX configuration
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury Montego and Cyclone fact sheet
Cyclone GT separation
- Value
- The 335-hp 390 4V GT belongs to Cyclone GT hardtop body codes 65H and 63H, not the regular MX series
- Application
- Identity boundary between Montego MX and Cyclone GT
- Type
- engine assembly / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications , 1968 Mercury full-line booklet
Factory fuel and lubrication systems
- Value
- Mechanical fuel pump at the left front, automatic choke, dry replaceable air-cleaner element, full-flow replaceable oil filter, and stationary shrouded sump pickup; oil refill excluding filter is 3.5 quarts for the 200 and 4.0 quarts for 302/390 engines
- Application
- Factory AMA regular Montego MX engine columns; pressure and fuel-pump ranges vary by engine family
- Type
- other / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
200 and 302 hydraulic valve trains
- Value
- Hydraulic lifters; 200 uses 240-degree intake and exhaust duration with 0.348-inch lift; 302 uses 256-degree intake, 254-degree exhaust duration, 0.426-inch intake lift, and 0.425-inch exhaust lift at zero lash
- Application
- Factory AMA 200-1V and 302-2V/4V engine tables
- Type
- valve train / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
390 hydraulic valve trains
- Value
- Hydraulic lifters; 390-2V uses 256-degree intake and 266-degree exhaust duration with 0.427/0.430-inch lift; 390-4V uses 270-degree intake and 290-degree exhaust duration with 0.4809/0.490-inch lift at zero lash
- Application
- Factory AMA regular 390-2V and 390-4V engine tables
- Type
- valve train / specification
- Car pages
- 1968 Mercury Montego MX
Sources: 1968 Comet, Montego, and Cyclone AMA specifications
Cars Using This Engine
1 linked car page.
54D sedan, 65D hardtop, 76D convertible, or 71C station wagon
1968 Mercury Montego MX
Montego MX model series; not a Cyclone GT