Its not much of a hassle to get a car tuned. No sense in dropping big bones on a set of cams if youre not going to tune it. Tuning, aside from longevity, will make the most of your mods and like any major engine mod, you tune to "teach" your ECU how to use your setup. Its like putting your 6 year old on a bike and sending them down the street without showing them how to do it. Your ECU will have NO idea what to do with an aftermarket setup like what you speak of unless you tune it.