Hi everyone I am a new member to the site, but have been reading the posts for a while now. I recently had the heads removed on my 98 cobra due to one being warped. Both heads were milled to made them true again and the overheating is now fixed. My new concern is the valve train noise that seems to be coming from the passenger side. It sounds like a faint knocking that doesn't get any louder when you rev the engine. I have excellent oil pressure and run 5w-30 castrol in the car. Anyone have any ideas what i should check or if i should even be concerned? The car seems to run fine and has plenty of power. Any help would be appreciated as I am new to the modular motors.