They were pretty stock in the 50s, but after that the amount of “stock” went away pretty quick. Remember Smokey Yunick’s 7/8s scale Chevelle that sparked the need for body templates?
Yup! And how he complained in his Mechanics Illustrated, or one of those magazines I miss, column.
My ...Hmmm ...hesitate to mention...heros was Jr Johnson. I learned to drive reading his “Guide to Good Driving” book.
Those were the days.