Engine Summary
- Manufacturer
- Ford Motor Company
- Family
- Ford 351 Cleveland and 385-series 429
- Displacement
- 429 cubic inches
Also Known As
351-4V Cleveland351C-4V1971 Spoiler 429 Cobra Jet1971 Cyclone Spoiler 429 CJ429 CJ Ram Air
Engine profile
1971 Mercury Cyclone Spoiler engine range
Ford 351 Cleveland and 385-series 429 · 429 cubic inches · Ford Motor Company
Identification reference
Engine Details
Source-backed component numbers, codes, stampings, and application notes.
429 Cobra Jet Ram Air
- Value
- Functional hood-scoop induction available with the 429 Cobra Jet
- Application
- Optional 429 Cobra Jet induction path; requires car-specific order and component evidence
- Type
- air cleaner / specification
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Mercury full-line brochure , 1971 Mercury full-line prestige brochure, revised edition
1971 351 four-barrel engine codes
- Value
- M identifies 351 CID-4V; Q identifies 351 CID-4V GT
- Application
- Ford's September 1970 all-car service table; exact Cyclone Spoiler M/Q application and individual-car identity still require the serial-bound record
- Type
- engine assembly / stamp
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Ford Car Shop Manual, Volumes I-V demo extract
1971 429 Cobra Jet engine code
- Value
- C identifies 429 CID-4V CJ
- Application
- Ford's September 1970 all-car service table; exact non-Ram-Air Cyclone application and individual-car identity still require the serial-bound record
- Type
- engine assembly / stamp
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Ford Car Shop Manual, Volumes I-V demo extract
1971 429 Cobra Jet Ram-Air engine code
- Value
- J identifies 429 CID-4V CJ Ram-Air
- Application
- Factory model-year code corroborated for a documented Cyclone Spoiler J-code example; not proof of any other car's engine or surviving components
- Type
- engine assembly / stamp
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Ford Car Shop Manual, Volumes I-V demo extract , 1971 Mercury Cyclone Spoiler, Kissimmee 2020
351 four-barrel Cleveland V8
- Value
- 351 cu in, 285 gross hp at 5,400 rpm, 370 lb-ft at 3,400 rpm, 10.7:1 compression
- Application
- Standard 1971 Cyclone Spoiler engine
- Type
- engine assembly / specification
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Mercury full-line brochure , 1971 Mercury full-line prestige brochure, revised edition
429 Cobra Jet V8
- Value
- 429 cu in, 370 gross hp at 5,400 rpm, 450 lb-ft at 3,400 rpm, 11.3:1 compression
- Application
- Optional 1971 Cyclone Spoiler engine
- Type
- engine assembly / specification
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Cyclone Spoiler: Big Bad Mercury , 1971 Mercury full-line brochure , 1971 Mercury full-line prestige brochure, revised edition
No 1971 Super Cobra Jet path
- Value
- Mercury did not offer the Drag Pack for 1971, so the 429 remained a Cobra Jet rather than a Super Cobra Jet
- Application
- Model-year boundary; do not transfer the 1970 Drag Pack configuration into 1971
- Type
- engine assembly / specification
- Car pages
- 1971 Mercury Cyclone Spoiler
VIN engine-code position
- Value
- The engine-code letter follows the two-character body serial code and precedes the six-digit consecutive unit number
- Application
- 1971 Ford-built passenger-car VIN decoding boundary; decode the complete serial and compare it with the order record and inspected components
- Type
- engine assembly / stamp
- Car pages
- 1971 Mercury Cyclone Spoiler
Sources: 1971 Ford Car Shop Manual, Volumes I-V demo extract
Cars Using This Engine
1 linked car page.
Two-door hardtop
1971 Mercury Cyclone Spoiler
351-4V Cleveland, 285 gross hp