Dyno Don: 429 car was a dog!
According to Kevin Marti, in his book "Cougar...by the numbers", L-M produced two 1968 Boss 429 Cougars (via Car Kraft). Beyond that, it is known that one went to Eddie Schartman and the other went to Dyno Don Nicholson--two pro drag racers who were campaigning Cougars at the time.
In a recent interview with Royce Peterson (see TCCN's TCP magazine Feature Archive), Dyno Don said the 429 car he got was a dog, so they replaced the engine with a 427. I'm on the road, so I don't have my library handy, but it seems to me that one of the 429 Cats was found several years ago. I don't remember whether a restoration was undertaken or not.
Mark, you're absolutely right about these cars being worth a fortune. Another of Dyno Don's Cougars, the 1969 Super Cat Coca Cola Thurst Eliminator, was recently restored and is currently for sale (See TCCN's TCP magazine Feature Archive). The asking price? $200,000! I told 'em I'd take two.
Keep on Cattin'
Steve