Marcum would later rename his sanctioning body the Automobile Racing Club of America (ARCA), whose Bondo/Mar-Hyde Series continued racing at Flat Rock until 2000, with Frank Kimmel winning the final ARCA premier series race at the track. Simmons remained in her position until 1970. Following Marcum's death in 1981, wife Mildred and grandson John Drager took over track operations; when John departed for other interests, brother Ron became track promoter.
Marcum would later rebrand his governing organization as the Automobile Racing Club of America (ARCA), whose Bondo/Mar-Hyde Series continued racing at Flat Rock until 2000, with Frank Kimmel winning the final ARCA top-tier series race at the track. Simmons remained in her role until 1970. Following Marcum's passing in 1981, his wife Mildred and grandson John Drager took over track operations; when John left for other pursuits, brother Ron became track promoter.