are you sure you have the distributor installed the right way? if you're off even just a tooth then you can't start it. did you make absolutely sure that you didn't somehow get the crank and cam off from each other? you might check your cap and rotor as well. i was helping a friend of mine work on his ford 300 inline 6 and we actually forgot to put the rotor back on the distributor before we put the cap back on. not saying thats what you did but its a funny story