Why would a cam entail vehicle downtime? Once the cam is in and tuned you should be good to go. I daily drove a 5 liter mustang for years with a pretty hefty cam and it was fine.. What makes the 3800 different for daily driving with a cam? The reason I'm asking is because I drive my car a lot in the spring/summer. I have another vehicle, but I like to drive my GTP a lot and am planning for a cam in the future.