Darlington Raceway held a 200-mile Modified-Sportsman race on April 30th, 1955. The slim, and incomplete information about this race has been reported in a few publications as being run on July 4th, 1954. Darlington did run Modified-Sportsman races on July 4th in 1952, and 1953, but not 1954.
Twenty-eight cars qualified by time trials on April 28th, and 29th, with the balance of the 60-car field being set by a draw. Bill Widenhouse started on the pole with a speed of 113.897 mph. Fireball Roberts driving the Fish Carburetor
#M-3 Modified took the lead at the green flag, and held it for the first 4 laps. Roberts again took over the lead on lap 92, and held it until the checkered flag. Lap leaders were Fireball Roberts, Speedy Thompson, Curtis Turner, and Ralph Moody. Roberts won $1,880 for the victory before a crowd of 9,000 fans. If anyone has addition information please let me know, so I can do an update. jack98@sc.rr.com
Articles and pics related to qualifying From April 28 Gastonia Gazette
Race results and other notes - scary situation for Buck Baker and his wife. From May 1 Florence Morning News
Though not a great quality image, you'll get the idea of how Fireball celebrated in Victory Lane with Miss Southern 500 from 1954.
And though they aren't labeled as such, I'm guessing these 2 pics from Mrs. Coker's on-line tribute are from her time as Miss Southern 500 1954.
Awesome pieces of research Chase. Well done!