The modified and supermodified divisions preceded weekly sprint car racing as the featured attraction at Williams Grove Speedway. Although sprint car racing has been presented at Williams Grove since 1939, it did not become a weekly attraction until 1967.
| WINS | JALOPY / SUPER MODIFIED / BIG BLOCK MODIFIED WIN LIST |
| 41 | Ray Tilley |
| 31 | Johnny Mackison, Sr. |
| 30 | Dick Tobias |
| 17 | Bobby Hersh |
| 12 | George Speck |
| 10 | Bobby Abel |
| 9 | Leroy Felty Mitch Smith |
| 6 | Bobby Gerhart, Sr. |
| 5 | Bud Folkenroth Gene Goodling Bill Miller |
| 4 | Johnny Dubendorf Scott Smith |
| 3 | Lyle Beahm Russ Delp Neil Haight George Kessler Junior Ritchey Roger Sowers Buzz Wilson |
| 2 | Jerry Banks Al Chamberlain Lynn Paxton Buzzy Richardson Frankie Thompson |
| 1 | Bernie Adams Ralph Blose Donnie Burg Jack Denniston Paul Handshaw Moe Harden Fred Hurley Shorty Kerschner Dick Kinard Joe Lingle Naill Marlett Eddie McCardle Charlie Moyer Brian Osgood Pee Wee Pobletts Gerald Zeckman |
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