Reference Details
- Common issue
- Treating any 428 displacement reference, installed FE engine, or non-Cyclone application code as proof that a 1968 Cyclone GT was factory-built with the Cobra Jet option.
- Confidence
- documented
- Correct value
- The reviewed 1968 Ford/Mercury warranty-number table separates 428-cu-in 4V engine codes, including Q for 428 4V, P for 428 4V Police, and W for 428 4V Hi-Perf; the source does not by itself map those codes to a specific Cyclone GT Cobra Jet build.
- Where to check
- Fifth character of the warranty number/VIN and corroborating invoice, build sheet, Marti/Ford record, or original door tag.