Bill,
Thanks. I have the 1997 registry and another book on Mustangs which also makes a passing mention of the 390 thing. I have driven just a few of them and one ran really well and the other two seemed to lack a lot, so I figured maybe the one actually had a 428.
By the way, does anyone know when the new Cobra registry is going to be released? I thought it was supposed to have been in March.
Ron