Make sure you don't don't have the crank and nutral safety wires on the wrong posts.

If you ground the neutral safety post it should start with the key. If so something is wrong with the safety switch or wiring.

With MSD ignition you can toss the ballast resistor. Just tape the ends to the harness so they aren't hanging down, until you get a chance to rewire the car. If stock ignition isn't being used the ballast resistor does nothing.

The alt wire needs to go to the battery or the battery side of the switch. If you put it to the on side of the switch the car will never shut off with the emergency safety switch. Or if you don't feel like running the heavy alt wire all the way back there just run your hot ignition wire back there and attach it to the small on post(this option will only work if you have a 4 post switch)...