I was at OVC today for their open house.
Although I did not check every car there, there were many, the finished 'continuation R models' I looked over closely and some of the cars in work that I checked, were indeed K chassis.
They are not 'concours' matched stamping date/glass/specific fastener cars-but they make no pretense to be.
The cars were much nicer than I expected FWIW, and although I did not talk price, it would cost hundreds to prepare such a car.
The host, Jim Marrieta, was very gracious and answered every specific question.