Below is a link to one of Dick Wallen's videos, this one on sprint car racing up through the 1963 season (it is his volume 1; apparently there is a volume 2).
Some of the highlights:
It includes some good color on USAC, CRA and IMCA events.
There are all of the notable sprint cars from the era:? The Konstant Hot (which Foyt drove for a while); Bobby Marvin running a roadster on dirt;? Foyt in Watson's Blue No. 9: Foyt in his own sprint car at DuQuoin; Fike Plumbing and Hurtubise's?No. 56.
Some of the races include the late Steve Stapp running?with the leaders.
IMCA ran 52 events in 1963.? Check out the fair at St. Paul, MN.? There were 50 drivers entered for two days of racing, including Jud Larson on a comeback.? And check out the size of the crowd in the stands.
The flagmen?of the era were in my opinion just a little bit crazy.? You will see them on almost all the tracks standing halfway across the main straight?waving their flags as the winner -- or the field -- comes roaring by.