I don't know if there is such a thing as perfection. That is just judgement and judgement varies with many factors.
In my eyes the only issue for me would be that the car needs to be a hatchback and have A/C.
Mr.Brock certainly had and still does have quite a flair for design. He seems to have a greater understanding.
A couple of times I got the impression, I think accurately, that Carroll didn't care for the car much? I'm sure he had his reasons but I hope it wasn't that only Fred Astaire and Pete Brock were known for wearing ascots?
Oh, I forgot. Roy Rogers did too, but in his case it was a bandana. Trigger liked it. Not so much Dale and Gabby Hays.