In addition, the V-6 stock block engines (Buick-Menard) were allowed 55 inHg (27.0psi) of boost at all races, instead of just at Indianapolis.
Sebagai tambahan, mesin blok stok V6 (Buick-Menard) diizinkan dengan syarat tekanan maksimal 55 inHg (27.0 psi) di semua balapan, bukan hanya di Indianapolis.