Gastrick, That is one of my favorite vintage drage race pics.
The guys in the MO, Kan, Okla, Texas area have a number of drag strips that don't strictly apply the rules. The Wisconsin guys have double hoops, but not all the other necessary bars. The SoCal guys have double hoops but don't meet NHRA. They run at Bakersfield and at other locations where the ANRA is sponsoring the event. Because the cars aren't very fast, they have been allowed to run even though not entirely legal. I'll be the only HA/GR car around here and as such, I figured I better be 100% legal so I don't have any hassles from the tech guys.
The way I'm building this thing, I can put my fiberglass Fiat body on it, add a lot of horsepower, slicks and and an automatic trans and run as quick as 10:00, legally.