1989 - 433 attempts + 38 sacks = 471 called passes . . . 423 rushes - 38 sacks = 385 called runs. 471/(471+385)=55% pass
1991 - 419 attempts + 34 sacks = 453 called passes . . . 416 rushes - 34 sacks = 382 called runs. 453/(435+382)=55% pass
So pass-heavy, considering the way BYU usually went run-heavy when way ahead, but not really skewed.