RIVER GLADE, NB – Work in the pit area delayed by the wet spring have forced officials at Petty International Raceway to postpone the season opening date to May 31 with the running of the Irving Blending & Packaging 100 for the Parts for Trucks Pro Stock Tour. The Lafarge Aggregates & Concrete event slated for May 11 will be postponed to later in the season. Besides pro stocks the May 31 event will feature Sportsman, Mini Stock and Street Stock; racing starts at 6 p.m.