We don't like creating a team unless we have the stats or at least some adjacent clues. Sacks weren't counted back in the day, so we go by TFL (specifically yards lost per TFL) or something like that. We have used a kicker's career FG % a few times, as that's all that we could find. But we'll spend hours on a team if it requires it - watching old game footage for every jersey number, etc.
We'll research the '68 Oklahoma State team and let you know.