I have been using locked out mechanical advance+ correct set up and dialed in vacuum advance (ported vac source) on my car for over 5 years. Its is primarily street driven.
same XE284H-10 cam. I don't change any thing to run at the track other than tire pressure. The tune up is exactly the same.
The locked out timing is very, very effective for this cam, on the street.
This is what this cam wants.