Tommy,
If the engine cranks over ok, he must have power in the start mode of the ignition switch.
Can you bypass the MSD unit completely and try it with just a regular ignition wiring set up? I have mine wired to a terminal strip so I can take two short wires and disconnect the MSD unit and then just use the coil and distributor like a regular unit and it has worked when I tested it. Also if you have another person there, try having them watch the high output wire of the coil and see if you are getting anything out of it when you crank the motor over or use a remote started and do it yourself. Note! You can get a real jolt if it is putting out the correct voltage, so be careful, but I am sure that you already know that.
Ron