Complex sentence: SEC teams did not play a uniform number of conference games until 1982, the number of conference games teams played ranged from 4 to 8, but most played a 6 or 7 game schedule.
Split into simpler sentences: SEC teams did not play a uniform number of conference games until 1982. Prior to that the number of conference games teams played ranged from 4 to 8, but most played a 6 or 7 game schedule.