The “R-code” phrase seems to come out of Collins’ mouth as much as “outstanding,” another of his trademark expressions.
These Mustangs with the 335-horsepower 428 Cobra Jet get all the attention from collectors and enthusiasts – even K-code’ ‘Stangs’ with the venerable 289 V8 are the subject of conversation in the same crowd.
But, the S-code versions are often overlooked because Ford only offered the 325-horsepower 390 V8 from 1967 to 1969; according to the Marti Report for Collins’ S-code rescue, Ford built 472,209 Mustangs in 1967, but only 2,180 came with the 390 engine and four-barrel carburetor