Just a 284-484?

My 360 has this cam. I don't know about 400 hp but kinda close. Runs upper 11's in my 3000 lb Demon.
MP 284/484.Flat tops, 2.02 valves with a mild port clean up. Torker II single plane, 750 holley. Pump gas.

Upper 11's? Your going to need 400+ in most cases to run low 12's. Of course, alot depends on the cars set up, street, track...etc......