I tried to modify my previous comment, shortly after I've found the same picture as you on the net;
Here once again my corrected answer:
I only read your comment, 'Is this Bill Boyd's Miller Corvette ?' and answered with 'no'
Checking the picture carefully, which I've found now on the net too, I can confirm for sure, that #49-car is the same as the puzzle car. But it is not 'Boyd's Miller Corvette'
LOCKED for you, to find out correct details