The first day of the marathon Chevrolet Performance NHRA U.S. Nationals began under a delay but came storming through at the conclusion.

Gary Summers opened Wednesday’s first session by driving his U/Stock 1977 Mustang to a 12.842, good enough for -1.808 under the index. Bill Dyer’s Factory Stock/K late-model Mustang was second quickest with a 10.196, -1.704 performance. Randy Hopkins was third in his Factory Stock/B Mustang with an 8.545, -1.455 under the index.

There were 154 Stockers to make the first call Wednesday afternoon.

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In Super Stock, Ernie Neal cruised to the top of the Super Stock ladder in his four-door Caprice, nailing the Super Stock/P Automatic index with a 10.902 elapsed time, -1.74 under the index. Lincoln Morehead was second quickest with a 9.710, -1.290 while Paul Candies was third with his FGT/B 2012 Mustang, carding a 7.959, -1.241.

The Dodge Hemi Challenge got in one qualifying session, and it was Joe Comella’s New York-based Dart leading the pack with a 8.480. Gary Wolkwitz was second with an 8.532. Wendell Howes was third, recording an 8.564.

Competition resumes at 8 AM, on Thursday with the first round of Stock class eliminations.