Terry certainly is qualified to speak on this topic, from years of Shelby and Cobra ownership. He was a 289 owner when I was still peeing in my diapers.
I apologize for some misinformation. I guess I subscribe to too many magazines. That Shelby clone was not in Autoweek, it is in the current (February) issue of "Vintage Racecar Journal & Market Report". The picture is of a Mustang coupe on a track with wide tires, R-model front clip, etc. The full text of the ad is as follows: "1965 Mustang "K" Coupe recreation of Shelby trans-am coupe. Has run HMSA, SCCA, SVRA events. Always front-runner at fraction of trans-am car cost. Rush 347 small block with dyno time only, built by pro race shop. Log books from 1991. $28,500. (408) 578-8232 Tim."
Sounds like somebody might get a really nice deal...