Probably. I haven't seen Dana in a few years, but last I heard he still had the car. He sold his one-owner 1970 hemi Charger to fund the restoration of the D/Dart. Lee used to live fairly close to him and may know more.
I haven't seen Dana Vincent since the late 80's/early 90's. However, his hemi heads ended up in the machine shop I worked at in the late 90's. He was getting ready to sell his Charger and took it to a shop nearby that we did work for. They removed the heads, sent them to us. I believe it was using oil and they were trying to determine where the oil was going. I had to go over to the shop with the dial bore gauge and measure the bores in the car.