What Cal said:
"They where neat to watch, they where pure hell to maintain"
I used to crew on a Super Stock 67 Plymouth Hemi four speed car, geez what a parts eater.
I have a friend that calls them a "4 S Mess".
When I started racing Mod Prod was still around and some of them bracket raced at Assumption. One guy could make 3 runs before it ate a clutch. Another had a Doug Nash in a small block Corvette and it would make about 2 runs before it ate gears.
As said, awesome to watch, miserable to own.