To the best of my recollection, my first USAC sprint car race was the 1967 Joe James - Pat O'Connor Memorial 100 lapper at Salem. I didn't start keeping records of races attended until 1970, but I do remember that race as being my first USAC sprint race. My first USAC race ever was the 1964 Yankee 300 stock car race on the IRP road course and I first saw USAC Silver Crown cars at DuQuoin in 1965. Don't believe I ever saw an IMCA race.