what year go from stock body sheet metal?
For you folks looking for stock car racing, it seems you are looking for oranges in an apple cart.
NASCAR moved on from stock car racing decades ago, and moved to something like "stock appearing" in order to accommodate the influx of Big Money, advanced technologies, the audience's demand for higher speeds and the resulting safety demands.
But stock car racing didn't die; it has continued actively at smaller circle and road tracks.
There are 62 race tracks in New York State, for example, and at some a ticket is 10 bucks, or free if you're a senior citizen on saturdays.
Hot dogs, cheap beer, and lots of cheering for your neighbors on the track.
And you can actually run a car of your own on a shoestring budget.
And there is also vintage racing. The stock cars of yesteryear routinely show up at The Watkins Glen track near me.