ignition problems

Ok now i got everything hooked up antifreeze and tranny fluid line etc. I start it up and it will not keep running by itself first of all? I heard this engine run before i bought it so i know it is good only have 400 miles on it. It does sound strong. I am wondering what that problem could be. Also the starter is getting hung up in the flywheel when i rev it. I am assuming i need a shim? Let me know what you think guys. Hey Yellow i did not change out the ignition to petronix i just hook a wire from the start side of the ballast and walah!Q. I guess the wire i thought was the coil + was not.