I’m not sure about the walls…..
The USAC show was scheduled on a back-to-back after Winchester. Several cars got crashed on Winchester and couple others were not planning to go the following night. The car count was expected to be a bit low and the weather forecast was calling for rain. The race was cancelled early on the day of the event.
Shady Bowl is a unique track for sure and I hope this is well supported. Thanks to the series and track for scheduling it!
Brian Gerster