Hello everybody. I've inherited a 68 Dart with a 225 /6. I have this urge to make it nasty just to be different. What would it take to run in the low 13s high 12s. I already have 3.91 gears for it, headers, 4-barrel carb. I know I need to get the intake, but how about the engine what do I need to do to it to make it run the times I want? Any help, advice will be greatly appreciated.