Were 428 Cobra Jets equipped with a rev limiter?

Ford did not install a rev limiter during the 1968 and 1969 model years. In 1970, Ford added an electronic engine RPM limiter/governor to Mustangs equipped with 428 Cobra Jet engines and 4-speed transmissions. These units limited spin up to 5,800 rpm in an attempt to keep warranty claims to a more manageable level. Fortunately (or unfortunately, depending on how you look at it), removal was quite easy and a great many of these units have failed to remain attached to the cars they were originally installed in.