It really depends on how close you have all of your tolerances set. If you measured everything (ring gap, bearing clearances etc) to a gnats ball hair, then (getting ready to be flamed), break-in of more than 1/2 hour or so is unecessary.
FWIW, when my Dad rebuilds his racing motor (sbc spinning to 8grand, at 600+ HP) in circuit racing, he gives it 2 laps to check water temp, oil temp and oil pressure, then hammers it. He has always told me that break in is unnecessary (except if using flat tappet cam, then obviously you need to give it ample oil supply initially).
I've rebuilt several motors, SBF, SBC, 4 bangers, V6s, L-6 etc and never blown any of them up. Hell, the 302 ford I built for oval dirttrack, I didn't even give it a chance. Warmed it up and raced it...straight off the trailer. (late getting to the track). I won that heat and the engine never gave up, no matter how badly I valve floated it!!
I don't know if boosted applications make any difference to break in, but I would assume not. I think that you are good to go.
Tim