I'm either doing delta or webcam... Read mix review on delta its much cheaper just half assed mostly. Anyway I've seen people.do just intake cam than others do both... Now is it better to do both or just the intake cam.. Please explain why you choose one or both. Thank you kindly.

It's best to do both. Anything you can do to help your engine breathe. That means get the air in and get the exhaust out. You'll be happy you did both at once.