Is this a brand new, flat tappet cam? How long have you been trying to start it? The break-in lube is probably gone at this point and firing it now would wipe the cam on break-in. Motor needs to fire almost immediately when breaking in a new flat tappet.
Ideally yes but I've had two instances where we spun the motor over for a heck of a lot.longer than OPs stated 60 seconds and both motors were fine. One is videoed on my YouTube channel where we were trying to do break in in cold weather. Both times the cam was fine and the car went on to make 100s of 1/4 mile hits without issue. I've had guys tell me "if it don't start on the third spin take the cam out it's junk". Doubtful.
