The Dallas Cowboys will undergo significant front office changes in personnel, responsibility and direction before the April 29 National Football League draft, Cowboys President Tex Schramm said.

The changes include the reduction in responsibility and authority of Gil Brandt, vice president in charge of personnel, and the addition of a pro personnel director, which the Cowboys have never had, the Dallas Morning News reported yesterday.

Schramm described the changes as "a little overhaul, and I think it's going to be healthy."

The pro personnel director will be hired from outside the organization and will be in charge of scouting and evaluating NFL players, a job currently performed by Brandt, Schramm said.

Brandt will no longer be in charge of re-signing veterans and probably will not be responsible for signing draft choices, Schramm said. Brandt will remain in charge of organizing the Cowboys' complex network for signing rookie free agents, according to Schramm.

Schramm said Brandt, who has been with the Cowboys since their inception in 1960, is being freed to turn full attention to college scouting.

"Most clubs have pro personnel directors," Schramm said. "I think college scouting has become so complicated and time-consuming that I don't think the same man can do both. Gil has been doing that. This will now enable him to devote the necessary time on the preparation of the draft." . . .

Chicago Bears Coach Mike Ditka heads the list of 11 former all-America football players, six linemen and five backs, who were named to the National Football Foundation and Hall of Fame's Collegiate Class of 1986, Vincent dePaul Draddy, chairman of the board, announced.

Ditka, an end at Pittsburgh during 1957-60, was joined by two Heisman Trophy winners, Steve Spurrier of Florida and Ohio State's Archie Griffin.

The other eight players chosen by the foundation's 12-man Honors Court: Vince Banonis, University of Detroit, center, 1939-41; Ron Beagle, Navy, end, 1953-55; John Brodie, Stanford, quarterback, 1954-56; Al DeRogatis, Duke, tackle, 1945-48; E.J. Holub, Texas Tech, center, 1957-60; Richie Lucas, Penn State, quarterback, 1957-59; Jack Pardee, Texas A&M, linebacker, 1954-56; and Mel Renfro, Oregon, halfback, 1961-63.