heres what im not understanding.

If the MSD is good and the car cranks over with ignition, what is preventing the coil from getting juice?

Does the mag pickup in the distributor tell the msd to power the coil? If the MSD small red is on constant 12V and the heavy red to batt, black good ground, white not used, coil blk/orange hooked up properly to coil and the mag from msd to dist hooked up shouldnt it have spark? what else does it need?