DEL CITY – The Red Dirt Rangers and Kyle Dillingham will headline an April 27 benefit concert to help with the medical expenses of Oklahoma musicians Virgil and David Bonham. The concert is from 1 to 5 p.m. at Patriot Event Center, 3925 SE 29 in Del City. Tickets are $20 cash at the door. Doors open at noon, come early for the best seats. Virgil Bonham is in need of a heart transplant, and his…