How hard can a 273,run? (street/strip)?

hi, 1970's , 235/273 dart. lunati stock cam, 3 angle valve grind, trw pistons, 5.13 gear, 7 'slicks, stock four speed trans, launch at 6000, shift at 6000, ran 13.31 @ 102.38 , drove it on street and raced it.