Minus at least $1,000 a year, just to keep it. And 95% do not meet the first standard, and 99.99% do not meet the second.
Having an old muscle car is great if like old muscle cars (I do), but there are a lot better investments.
My sister in law had an ‘67 Olds 442. She bought it from her older brother when it was a few years old and had it for 45 years, bone stock, full service record and only serviced at Olds until they went tits-up, had all the documentation and whatnot.
Somebody boosted it a few years ago.