Bob and all,
I read this article with great interest. After the read I made the call to my longtime friend and IMO foremost authority of the 300F 4 speed cars, Wayne Graefen. Here is what I can offer based on Wayne's and my knowledge regarding these cars.
There were 9 built by Chrysler with the intention of going to Daytona. One of the 9 was a convertible that was ordered by a wealthy person for his personal use and never in the Daytona program. The cars that are documented to exist today are: a white convertible and 3 coupes. Two of those coupes were Daytona examples, one previously owned by Bob McAtee (sp), originally owned by Gregg Ziegler who Bob purchased it from after GZ made the record setting runs.
Don Petty does in fact owns a white coupe that was also in the Daytona program. I've seen that car over the past 30+years on two occasions.
The third car was originally ordered by Andy Drumm on Nevada and is the only 4 speed car ever equipped with A/C. This was the Graefen car and I have extensive documentation of this example as I stored the car for Wayne when he moved from California to Texas several years ago. I've also been behind the wheel more that once in that car. My final ride in Graefen's car was in Texas some years ago and we ran out of road before we got into 4th gear. That car is currently owned by club member Joe Jordan who lives in Wisconsin.
Now to the Hemmings article, that car started life as a 300F convertible with a Torqueflite and a 375hp engine. Don created this car from extra parts he had. I believe the club has the VIN of this example and I do too thanks to Wayne along with some photos. One sign displayed with the Petty convertible some years ago state it is 1 of 2 which was ever equipped with this trans and I guess that is true. What is not mentioned is that it is a "creation" and this was not a factory build. Here is just one comment Wayne sent me regarding the Petty car:
"Notice, it does NOT have the high volume air cleaners and they
are NOT red. Also, the hood braces are still in that car."
Bottom line is don't believe everything you read in publications,
John Lazenby