my cars been down for 6 months WON"T SPARK

You checked the timing chain, but did you actually check to be sure the cam is in time? Have you put a timing light on the number one wire to see if the ignition timing is correct? Do you have electronic ignition? MSD? Is your charging system working properly? Have you checked the battery voltage while cranking?

Ok, that's enough questions for you. The reason for last four questions is that some, if not all aftermarket ignition systems fail to operate under about 10 volts.