Our race times in the mid/late 80's indoors were run on substantially different tracks. NC's were held in Okc on a multicolored 10 laps to the mile board track. Millrose was run on similar, etc. Indiana had just about the nicest indoor track at that time. Our home place in Fayetteville was a tight turned flat 200m track inside a barn that we shared with the tennis team. The only large and oversized indoor track I know of during that era was IA State's flat 300m oval. Though, the hogs didn't pass that way until the early/mid 90's with Bruton, Hanley, Welsh, Bunston, etc.