Cylinder head discussion 340 with stock above deck pistons

Not with a stick car with 235 drag radials. He is dropping the clutch at 2500, bogging the engine down and driving out to a 2.0 60 foot. He needs to come out higher and manage the clutch slip with a bias ply slick and get it down to at least a 1.70 60 foot and the car should run in the 12's. Clutch management, either a lot of foot control or a Clutch Tamer or a Soft-Loc clutch. He needs to slip the clutch and keep the engine at or above peak torque until the rpm's and tire speed match up. Think of using the clutch like a high stall torque converter.