Cam choice depends on a bunch of variables which you haven't given us. Street car? Road Race? Drag Race? Jet Boat? How heavy, what gears, etc.

If this is a drag race car and you want to make maximum power then you'll need around 270 duration and as much lift as you can afford. You'll also need some gear and converter to make it work.

If it is a Pro Fairground car that goes to the burger stand once a month then put a smaller cam in there so you can drive it from light to light.