Hi, having been alerted to this thread by Doug S. I thought I should introduce myself as I currently own the two winged cars that were shown earlier in the thread at the New Zealand Mopar show.
Both are genuine cars, as Alex said the Superbird is a matching 4spd 6bbl car, the Daytona is the Cal Gas car but doesn't have the original engine or 4spd in it.
The Daytona is V2 which matches the fender tag and broadcast sheet; When it was used by the Cal Gas Corp. I believe it was a blue colour, it was painted Bronze by the son in law of the owner in MO, at that time it was also fitted with an auto box as the owners Daughter couldn't manage the 4 spd.
The nose that is on the car now came from a Green Daytona, I was told this by the owner in CA that I got the car from, as he purchased it, in the condition shown in the latest photos from the MO owner.
I believe the original 4 spd box and some of the gas equipment still exist, but haven't been able to verify this yet.