I've seen a guy do them and he wasn't very skilled and they turned out good. It was on one of those newer challengers.
We gave an estimate to do them on a newer Vette and the boss goes, "on the net it says you can just bolt them in and go." So the old man goes, "does this Vette have a front clip or a fender?". Boss goes, "front clip but we won't need to take it off." Old man replies, "sounds like a can of worms." hahahaha