| | 1978 | Sprint Grand Nationals |
| | McArthur Park Raceway | Oklahoma City, OK |
| Finish | Driver | Hometown | Kart | Engine |
| | 100cc McCulloch Amateur Heavy |
| 1 | | John Scott | Redondo Beach, CA | Hartman | Mc91B1 |
| 2 | | Scott Salyer | Corcoran, CA | Margay | Mc91B |
| 3 | | Steve Fox | Dewey, IL | Margay | Mc |
| 4 | | Kelly Heil | California | Invader | Mc91B |
| 5 | | Randy Wallace | Wasco, CA | Margay | Mc92 |
| 6 | | Harry Madea | Torrance, CA |
| 7 | | Jerry Hill | Oklahoma |
| 8 | | Glenn Araki | Fresno, CA |
| 9 | | Fred Cory | Quincy, IL |
| 10 | | Robert Simpson | Michigan |
| | 100cc McCulloch Amateur Light |
| 1 | | Jimmy Gruber | Mt. Vernon, IN | Magnum | Mc |
| 2 | | Scott Salyer | Corcoran, CA | Margay | Mc91B |
| 3 | | Mike Ensign | Tulsa, OK | Hartman | Mc92 |
| 4 | | George Ito | Ventura, CA | Emmick | Mc |
| 5 | | Greg Peterson | Sacramento, CA | Special | Mc92 |
| 6 | | Phil Harris | Dallas, TX |
| 7 | | Bryan Waller | Oklahoma |
| 8 | | Gary Sooter | Texas |
| 9 | | Tom Hunter, Jr. | Hawthorne, CA |
| 10 | | Danny Aratoli | Sacramento, CA |
| | 100cc Stock Amateur Heavy |
| 1 | | Pat Burris | Manhattan Beach, CA | Margay | Yamaha |
| 2 | | Mike Manning | California | Bug | Yamaha |
| 3 | | Randy Wallace | Wasco, CA | Margay | Mc92 |
| 4 | | Glenn Araki | Fresno, CA | Emmick | Yamaha |
| 5 | | Mike Stryker | Washington | Invader | Yamaha |
| 6 | | Jerry Hill | Oklahoma |
| 7 | | Bill Ross | Washington |
| 8 | | Dennis McLemore | Memphis, TN |
| 9 | | Bill Stryker | California |
| 10 | | Ray Weygand | Oklahoma |
| | 100cc Stock Amateur Light |
| 1 | | Harlan Willis | Oxnard, CA | Hartman | Komet K55 |
| 2 | | Ron Emmick | Sacramento, CA | Emmick |
| 3 | | Doug Cook | Ohio | Invader | Yamaha |
| 4 | | Robert Hune, Jr. | California | Margay | LMR 100 |
| 5 | | Steve Markham | Prairie Village, KS | Invader | Komet K78 |
| 6 | | Rex Hayes, Jr. | Tacoma, WA |
| 7 | | Victor Gonzales | Florida |
| 8 | | David Laubach | California |
| 9 | | Brian Weber | California |
| 10 | | Greg Talmadge | Oklahoma |
| | 125cc McCulloch |
| 1 | | Tommy Crosby | Dickson, TN | Magnum | Mc101 |
| 2 | | Leroy Wilkerson | Conroe, TX | Margay | Mc101 |
| 3 | | Damon Meek | California | Invader | Mc101 |
| 4 | | Chuck West | Orlando, FL | Hartman | Mc101 |
| 5 | | Tom Hunter | Hawthorne, CA | Invader | Mc101 |
| 6 | | Larry Fox | Dewey, IL |
| 7 | | John Tipps | California |
| 8 | | Glen Hagans | Kansas |
| 9 | | Doug Wright | California |
| 10 | | Galen Puls | New Mexico |
| | 200cc McCulloch Amateur |
| 1 | | Scott Salyer | Corcoran, CA | Pruett | Mc91B |
| 2 | | Greg Peterson | Sacramento, CA | Special | Mc92 |
| 3 | | Glenn Araki | Fresno, CA | Emmick | Mc91B1 |
| 4 | | Merrill Kenworthy | San Jose, CA | Invader | Mc91B1 |
| 5 | | Edward Thayer | Clearwater, FL | Emmick | Mc93 |
| 6 | | Jay Chipman | New York |
| 7 | | Rex Hayes, Jr. | Tacoma, WA |
| 8 | | George Ito | Ventura, CA |
| 9 | | Duke Miller | Michigan |
| 10 | | Charles Petzold | Waco, TX |
| | 80cc McCulloch Amateur |
| 1 | | Jilene Chivel | Lakewood, CA | Bug | Mc49 |
| 2 | | Michael Vaughn | Texas | Margay | Mc49 |
| 3 | | Michael Vigliarolo | New York | Emmick | Mc49 |
| 4 | | Charles Leavitt | Fresno, CA | Bug | Mc49 |
| 5 | | Scott Myhr | Florida | Hartman | Mc49 |
| 6 | | Frank Vigliarolo | New York |
| 7 | | Sharon Scovill | Kansas |
| 8 | | Lindell Anthony | California |
| 9 | | Kevin Dennis | Florida |
| 10 | | Joe Scovill | Kansas City, MO |
| | Expert I |
| 1 | | Howard Combee | Ontario, CA | Bug | Yamaha |
| 2 | | Harlan Willis | Hartman | Yamaha |
| 3 | | Lynn Haddock | Chattanooga, TN | Magnum | Mc |
| 4 | | Rick Pollock | Aptos, CA | Magnum | BM |
| 5 | | Mike Manning | California | Bug | Yamaha |
| 6 | | Ken Yagi | Oxnard, CA |
| 7 | | Ricardo Valerio | Mexico |
| 8 | | Scott Pruett | Roseville, CA |
| 9 | | Ron Emmick | Sacramento, CA |
| 10 | | Dan Larson | Oregon |
| | Expert II |
| 1 | | Kyle Adkins | Rowland Heights, CA | Hartman | Komet |
| 2 | | Ken Yagi | Oxnard, CA | Hartman | Mc |
| 3 | | Tommy Crosby | Dickson, TN | Magnum | Komet |
| 4 | | Lynn Haddock | Chattanooga, TN | Magnum | Komet |
| 5 | | Rocky Buff | Pico Rivera, CA | Bug | Komet K78 |
| 6 | | Scott Pruett | Roseville, CA |
| 7 | | Mark Dismore | Greenfield, IN |
| 8 | | Dave Bradley | Tulsa, OK |
| 9 | | Dale Fischlein | Davenport, IA |
| 10 | | Rick Pollock | Aptos, CA |
| 11 | | Chip Pendleton | Greendale, WI |
| 12 | | Howard Combee | Ontario, CA |
| 29 | | Terry Traeder | Quincy, IL |
| 30 | | Kim Campbell | Dallas, TX |
| | Expert III |
| 1 | | Dave Bradley | Tulsa, OK | Hartman | Corsair T-80 |
| 2 | | Greg Peterson | Sacramento, CA | Margay | Komet K78 |
| 3 | | Ron Emmick | Sacramento, CA | Emmick | BM |
| 4 | | Lynn Haddock | Chattanooga, TN | Magnum | Komet |
| 5 | | Jeff Nelson | Santa Clara, CA | Invader | Komet K78 |
| 6 | | Lake Speed | Jackson, MS |
| 7 | | Mark Dismore | Greenfield, IN |
| 8 | | Steve Markham | Prairie Village, KS |
| 9 | | Jimmy Gruber | Mt. Vernon, IN |
| 10 | | Rocky Buff | Pico Rivera, CA |
| 11 | | Dale Fischlein | Davenport, IA |
| 12 | | Larry Hill | Oklahoma |
| 28 | | Scott Pruett | Roseville, CA |
| | Expert IV |
| 1 | | Terry Traeder | Quincy, IL | Margay | BM |
| 2 | | Charles Toler | Memphis, TN | Emmick | Komet |
| 3 | | George Ito | Ventura, CA | Emmick | BM130 |
| 4 | | Mark Dismore | Greenfield, IN | Viper | Mc91B1 |
| 5 | | Rex Hayes, Jr. | Tacoma, WA | Bug | Mc125 |
| 6 | | Leroy Wilkerson | Conroe, TX |
| 7 | | Glen Parret | Oklahoma |
| 8 | | Bob Hawley | Oklahoma |
| 9 | | Don Morris | Oklahoma |
| 10 | | Charles Bass, Jr. | Oklahoma |
| | Junior I |
| 1 | | John Meyers | Cerritos, CA | Bug | Yamaha |
| 2 | | Rod Tull | Ontario, CA | Hartman | Mc92 |
| 3 | | Ken Johnson | California | Margay | Mc91 |
| 4 | | Mike Weninger | Vallejo, CA | Margay | Mc91B |
| 5 | | Mark Revord | Tacoma, WA | Emmick | Mc91B1 |
| 6 | | Tom Weninger | Vallejo, CA |
| 7 | | Kurt Burris | Fountain Valley, CA |
| 8 | | John Hunt | Oklahoma |
| 9 | | Scott Overbey | Burbank, IL |
| 10 | | Robby Flock | California |
| 18 | | Jeff Green | Owensboro, KY |
| | Junior II |
| 1 | | Rod Tull | Ontario, CA | Hartman | Komet K88 |
| 2 | | Tom Weninger | Vallejo, CA | Invader | Mc |
| 3 | | Adam Thompson | Ft. Worth, TX | Margay | Komet K88 |
| 4 | | Kurt Burris | Fountain Valley, CA | Margay | Komet |
| 5 | | Bryan Araki | Fresno, CA | Emmick | Komet K55 |
| 6 | | Mike Weninger | Vallejo, CA |
| 7 | | David Adams | Wisconsin |
| 8 | | Lance Holford | Yukon, OK |
| 9 | | Alan Stout | San Jose, CA |
| 10 | | Tim Meyers | California |
| | Rookie Jr. |
| 1 | | Matt Reed | Bakersfield, CA | Margay | Yamaha |
| 2 | | Michael Salvatore | Florida | Invader | Mc49 |
| 3 | | Roy Kenworthy | San Jose, CA | Invader | Mc49 |
| 4 | | David Craver | Oregon | Lancer | Yamaha |
| 5 | | Sal Noto | New York | Invader | Yamaha |
| 6 | | David Daughtery | Indiana |
| 7 | | Tim Koscher | Indiana |
| 8 | | Chris Hart | Washington |
| 9 | | Lee Hatch | California |
| 10 | | Derek Burris | Fountain Valley, CA |