The West Coast offense (which we now just call offense) wasn't popularized until Bill Walsh ran the 49ers in the 80's through the early 90's and won Super Bowls with two different quarterbacks playing it.
Even 25 years ago, guys had career numbers comparable to McCord's season this year, and were considered good players.
Look at McNabb's numbers. Even considering we were a run first team, his passing attempts are just ridiculously low by modem standards. His senior year, after which he was drafted second overall, he only attempted 22.8 passes per game. Only 6 teams attempted fewer passes per game this season.
McCord attempted double McNabb's passes per game this season.
Who knows what Philcox, or McNabb, would have done in this modern era.