So sorry to hear Topping Park will be gone...I grew up in OKC (well, Bethany, 'way back then a separate town) and flew countless hours at Topping Park, learned to fly combat there. Set the adjoining field on fire once with a Tiger Jet. Crawled into the ravine to retrieve a cutaway combat plane (more than once). Sifted a big twin-engine bomber through a small tree when the lines broke. Flew in, and helped officiate, several contests there. Many memories, good site, too bad it's over.
Lessee, fliers of that era, Marlin McGee, Don Clayton, Mark Anschutz, Hal Whitten, David Stone (my brother)... too many intervening years to recall all.