Cam question
#2
Oil change after about 100 miles; I probably wouldn't go over 3k or so in that time period. I think some people let the engine go through several "heating cycles"; start it up, let it warm up to operating temp, turn it off, let it cool down, start it up, let it run to temp, etc etc.
#7
If you are having them do dyno runs then they will have all ready heat cycled the springs so you should be good to go when you pick it up. Also since its a roller cam in these motor you dont need to change the oil. A Flat tappet cam is a different story.