May not be in Nebraska per say but states around Nebraska.
USAC Midwest Wingless Racing Association
Series - https://www.midwestwinglessracing.com/
Facebook - https://www.facebook.com/MidwestWing...ingAssociation

Also in the Dakota's you have the Northern Renegades Sprint Car Series & Western Renegade Non-Wing Sprint Car Series.

Northern Renegades Sprint Car Series
Series - https://nrsprints.com/
Facebook - https://www.facebook.com/NRSprints

Western Renegade Non-Wing Sprint Car Series.
Series - https://www.westernrenegadenon-wingsprintcarseries.com
Facebook - https://www.facebook.com/Western-Ren...09529020414966

The Upper Midwest Renegade Super Sprints runs Wing and Non-Wing Series.
Series - www.umsprints.com
Facebook - https://www.facebook.com/Upper-Midwe...-109129537216/